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Chapter Menu

Addition

2

- Lesson 2-1 Addition Properties
- Lesson 2-2 Problem-Solving Skill Estimate or

Exact Answer - Lesson 2-3 Estimate Sums
- Lesson 2-4 Two-Digit Addition
- Lesson 2-5 Add Money
- Lesson 2-6 Problem-Solving Investigation Choose

a Strategy - Lesson 2-7 Three-Digit Addition
- Lesson 2-8 Add Greater Numbers

Lesson 1 Menu

Five-Minute Check (over Chapter 1) Main Idea and

Vocabulary California Standards Key Concept

Properties Example 1 Example 2

Lesson 1 MI/Vocab

- I will use addition properties to add whole

numbers.

- Commutative Property of Addition
- Identity Property of Addition
- Associative Property of Addition

Lesson 1 Standard

Standard 3NS2.1 Find the sum or

difference of two whole numbers between 0 and

10,000.

Standard 3AF1.1 Represent relationships

of quantities in the form of mathematical

expressions, equations, or inequalities.

Lesson 1 Key Concept 1

Lesson 1 Ex1

Find the sum. Identify the property.

Lesson 1 Ex1

The sum is 12. The order in which the numbers are

added does not change the sum.

Answer 12 This is the Commutative Property of

Addition.

Lesson 1 CYP1

Which property is shown here? 4 3 3 4

- Identity Property
- Commutative Property
- Associative Property
- Personal Property

Lesson 1 Ex2

Jon has 7 pencils, 5 pens, and 3 highlighters.

How many writing utensils does Jon have?

7 5 3

5 7 3

5 (7 3)

5 10

15

Answer So, Jon has 15 writing utensils in all.

Lesson 1 CYP2

Monica has 3 red crayons, 6 blue crayons, and 7

purple crayons. How many crayons does Monica

have in all?

- 15
- 16
- 17
- 18

End of Lesson 1

Lesson 2 Menu

Five-Minute Check (over Lesson 2-1) Main Idea

California Standards Example 1 Problem-Solving

Skill

Lesson 2 MI/Vocab

- I will decide whether an estimate or an exact

answer is needed to solve a problem.

Lesson 2 Standard 1

Standard 3MR2.5 Indicate the relative advantages

of exact and approximate solutions to problems

and give answers to a specified degree of

accuracy.

Standard 3NS2.1 Find the sum or

difference of two whole numbers between 0 and

10,000.

Lesson 2 Ex1

To celebrate Arbor Day, a town planted trees one

weekend. On Saturday, 53 trees were planted.

Another 38 trees were planted on Sunday. About

how many trees were planted in all?

Lesson 2 Ex1

Understand

What facts do you know?

- On Saturday, 53 trees were planted.
- On Sunday, 38 trees were planted.

What do you need to find?

- Find about how many trees were planted in all.

Lesson 2 Ex1

Plan

You need to decide whether to estimate or find an

exact answer. Since the question asks about how

many trees were planted, you need to estimate.

Lesson 2 Ex1

Solve

First, find about how many trees were planted

each day. Estimate by rounding to the closest ten.

Lesson 2 Ex1

Solve

Then, add.

50

40

90

Answer So, about 90 trees were planted in all.

Lesson 2 Ex1

Check

Look back at the problem. If the question asked

for an exact answer you would find 53 38 91.

The estimate is close to the exact answer. So,

the estimate makes sense.

End of Lesson 2

Lesson 3 Menu

Five-Minute Check (over Lesson 2-2) Main Idea and

Vocabulary California Standards Example

1 Example 2 Example 3

Lesson 3 MI/Vocab

- I will estimate sums using rounding and front-end

estimation.

- estimate
- front-end estimation

Lesson 3 Standard 1

Standard 6AF1.2 Round off numbers to 10,000 to

the nearest ten, hundred, and thousand.

Standard 6MR2.4 Find the sum or

difference of two whole numbers between 0 and

10,000.

Lesson 3 Ex1

Kevin found 14 snails in his backyard after a

rain. The next day he found 28 more snails. About

how many snails did he find in all?

To find the total, find 14 28. Since the

question says about how many people, estimate 14

28.

Step 1 Round each number to the nearest ten.

Lesson 3 Ex1

Step 2 Add.

40

Answer So, Kevin found about 40 snails in all.

Lesson 3 CYP1

Joyce invited 16 girls to her birthday party. She

invited 11 boys. About how many people did she

invite to her birthday party in all?

- 27
- 35
- 20
- 30

Lesson 3 Ex2

Samir rode his bike 28 miles on Monday and 43

miles on Tuesday. Estimate how many miles he rode

on those two days.

You need to estimate 28 43.

70

Answer So, Samir rode his bike about 70 miles.

Lesson 3 CYP2

Devon wrote 27 sentences for homework on Monday

and 14 sentences for homework on Wednesday.

Estimate how many sentences he wrote on those two

days.

- 40
- 41
- 30
- 50

Lesson 3 Ex3

There were 65 clowns on the circus floor and 14

acrobats. About how many people were on the

circus floor?

You need to estimate 65 14.

80

Answer So, there were about 80 people on the

circus floor.

Lesson 3 CYP3

There are 17 roller coasters and 32 other rides

at Cedar Point Amusement Park. About how many

rides are there all together?

- 49
- 50
- 40
- 45

End of Lesson 3

Lesson 4 Menu

Five-Minute Check (over Lesson 2-3) Main Idea and

Vocabulary California Standards Example 1 Example

2 Example 3

Lesson 4 MI/Vocab

- I will regroup ones and add two-digit numbers.

- regroup

Lesson 4 Standard 1

Standard 3NS2.1 Find the sum or

difference of two whole numbers between 0 and

10,000.

Standard 3MR2.1 Use estimation to verify the

reasonableness of calculated results.

Lesson 4 Ex1

Jung found 17 seashells for his collection. His

mother found six more. How many seashells do they

have in all?

Step 1 Add the ones.

1

17

6

3

Lesson 4 Ex1

Step 2 Add the tens.

2

Answer So, 17 6 23.

Lesson 4 CYP1

Jolene collected 19 rubber bands. John collected

8. How many rubber bands do they have in all?

- 27
- 25
- 23
- 30

Lesson 4 Ex2

There are 34 girls and 37 boys in all the third

grade classes. What is the total number of boys

and girls in the third grade?

You need to add 34 and 37. You can use partial

sums.

Lesson 4 Ex2

34

37

Add the tens.

60

Add the ones.

11

Add the partial sums.

71

Answer So, 34 37 71.

Check for Reasonableness

Compare 71 to the estimate. The answer is

reasonable.

Lesson 4 CYP2

In a survey of the third grade, we found out that

48 students had dogs and 24 had cats. What is

the total number of dogs and cats owned by the

third graders?

- 70
- 60
- 84
- 72

Lesson 4 Ex3

Find the sum of 74 24.

4 ones 4 ones 8 ones

74

7 tens 2 tens 9 tens

24

8

9

Answer 98

Lesson 4 Ex3

Check for Reasonableness

Compare 98 to the estimate. The answer is

reasonable.

Lesson 4 CYP3

Find the sum of 45 33.

- 80
- 88
- 78
- 70

End of Lesson 4

Lesson 5 Menu

Five-Minute Check (over Lesson 2-4) Main Idea and

Vocabulary California Standards Example 1 Example

2

Lesson 5 MI/Vocab

- I will learn to add money.

- dollar sign ()
- cents sign ()
- decimal point

Lesson 5 Standard 1

Standard 3NS3.3 Solve problems

involving addition, subtraction, multiplication,

and division of money amounts in decimal notation

and multiply and divide money amounts in decimal

notation by using whole-number multipliers and

divisors.

Lesson 5 Standard 2

Standard 3MR2.1 Use estimation to verify the

reasonableness of calculated results.

Lesson 5 Ex1

Alicia bought a pen for 61 and an eraser for

15. How much did she spend for the two items?

You need to find the sum of 61 15.

Lesson 5 Ex1

One Way Add Cents

Add the ones.

Add the tens.

7

Place the cents sign after the sum.

6

Lesson 5 Ex1

Another Way Add Dollars

0.76

Answer So, Alicia paid 76 or 0.76 for the two

items.

Lesson 5 CYP1

Seth bought a lollipop for 52 and a pack of gum

for 36. How much money did he spend at the candy

store?

- 90
- 0.85
- 0.88
- 80

Lesson 5 Ex2

Yin-Chin bought two DVDs. One cost 16, and the

other was on sale for 6. How much did Yin-Chin

spend for the two DVDs?

You need to add 16 and 6.

Lesson 5 Ex2

1

Add the ones and regroup.

Add the tens.

Place the dollar sign before the sum.

2

2

Answer So, Yin-Chin spent 22 on the two DVDs.

Check for Reasonableness

The answer 22 is close to the estimate of 30.

So, the answer is reasonable.

Lesson 5 CYP2

Sadako paid 27 for a CD at the store, and 14

for a CD online. How much did she spend on the

two CDs?

- 41
- 31
- 50
- 51

End of Lesson 5

Lesson 6 Menu

Five-Minute Check (over Lesson 2-5) Main

Idea California Standards Example 1

Problem-Solving Investigation

Lesson 6 MI/Vocab

- I will choose the best strategy to solve a

problem.

Lesson 6 Standard 1

Standard 3MR1.1 Analyze problems by identifying

relationships, distinguishing relevant from

irrelevant information, sequencing and

prioritizing information, and observing patterns.

Lesson 6 Standard 2

Standard 3NS2.1 Find the sum or

difference of two whole numbers between 0 and

10,000.

Lesson 6 Ex1

KIRI My father and I needed to catch at least 10

fish. During the first hour, we caught 9 fish but

threw 4 back. The second hour we caught 16 fish

and threw 9 back. YOUR MISSION Find out if they

caught and kept at least 10 fish.

Lesson 6 Ex1

Understand

What facts do you know?

- During the first hour, they caught 9 fish but

threw 4 back. - During the second hour, they caught 16 fish and

threw 9 back.

What do you need to find?

- Find out if they caught and kept at least 10 fish.

Lesson 6 Ex1

Plan

You need to find an exact answer. You can use

addition and subtraction.

Lesson 6 Ex1

Solve

First, subtract to find out how many fish they

kept.

Hour One 9 4

5

Hour Two 16 9

7

Lesson 6 Ex1

Solve

Next, add the total for each hour.

Answer Kiri and her father caught and kept 12

fish.

Lesson 6 Ex1

Check

Look back at the problem. Yes, Kiri and her

father caught and kept at least 10 fish. They

caught 12.

End of Lesson 6

Lesson 7 Menu

Five-Minute Check (over Lesson 2-6) Main

Idea California Standards Example 1 Example 2

Add Three-Digit Numbers

Lesson 7 MI/Vocab

- I will add three-digit numbers and use estimation

to check for reasonableness.

Lesson 7 Standard

Standard 3NS3.3 Solve problems

involving addition, subtraction, multiplication,

and division of money amounts in decimal notation

and multiply and divide money amounts in decimal

notation by using whole-number multipliers and

divisors.

Lesson 7 Standard

Standard 3MR2.1 Use estimation to

verify the reasonableness of calculated results.

Lesson 7 Ex1

Lynda used 125 minutes of her cell phone minutes

last week and 37 minutes this week. How many

minutes has she used altogether?

You need to add 125 37.

Estimate

Lesson 7 Ex1

Step 1 Add the ones.

1

5 ones 7 ones 12 ones

125

Regroup 12 ones as 1 ten and 2 ones.

37

2

Step 2 Add the tens and hundreds.

1 ten 2 tens 3 tens 6 tens

Bring the 1 hundred down.

6

1

Answer 162

Lesson 7 Ex1

Check for Reasonableness

Since the answer 162 is close to the estimate of

170, the answer is reasonable.

Lesson 7 CYP1

Jesse used 143 minutes of his game trial Monday

and 47 minutes Tuesday. How many minutes has he

used altogether?

- 200
- 189
- 190
- 100

Lesson 7 Ex2

Celli bought a book for 4.13 and a bookmark for

2.48. How much did she spend?

Step 1 Add the ones.

1

3 ones 8 ones 11 ones

4.13

Regroup 11 ones as 1 ten and 1 ones.

2.48

1

Lesson 7 Ex2

Step 2 Add the tens.

1 ten 1 ten 4 tens 6 tens

6

Step 3 Add the hundreds.

4 hundreds 2 hundreds 6 hundreds

6.

Answer Celia spent 6.61.

Lesson 7 CYP2

Julian spent 6.15 at the grocery store and 2.96

at the gas station. How much did he spend in all?

- 9.01
- 9.11
- 10.05
- 8.99

End of Lesson 7

Lesson 8 Menu

Five-Minute Check (over Lesson 2-7) Main

Idea California Standards Example 1 Example

2 Example 3

Lesson 8 MI/Vocab/Standard 1

- I will add three- and four-digit numbers with

regrouping.

Lesson 8 Standard 1

Standard 3NS3.3 Solve problems

involving addition, subtraction, multiplication,

and division of money amounts in decimal notation

and multiply and divide money amounts in decimal

notation by using whole-number multipliers and

divisors.

Lesson 8 Standard 2

Standard 3MR2.1 Use estimation to

verify the reasonableness of calculated results.

Lesson 8 Ex1

In the library, there are 3,276 history books and

2,745 science books. What is the total number of

these two types of books?

You need to find 3,276 2,745.

Estimate

Lesson 8 Ex1

One Way Partial Sums

11

Add ones.

110

Add tens.

900

Add hundreds.

5,000

Add thousands.

6,021

Lesson 8 Ex1

Another Way Expanded Notation

5,000 900 110 11

900

110

11

6,021

Lesson 8 CYP1

At the video store there are 3,567 comedies and

2,655 dramas. What is the total number of these

two types of videos?

- 7,225
- 6,222
- 8,032
- 5,111

Lesson 8 Ex2

Californias tidal shoreline is 3,427 miles long.

If you traveled from one end to the other and

back, how many miles would you have traveled?

Solve using at least two different methods.

You need to find 3,427 3,427.

Estimate

Lesson 8 Ex2

One Way Partial Sums

14

Add ones.

40

Add tens.

800

Add hundreds.

6,000

Add thousands.

6,854

Lesson 8 Ex2

Another Way Expanded Notation

6,000 800 40 14

800

40

14

6,854

Lesson 8 CYP2

It is 1,927 miles from Houston, Texas to San

Francisco, California. If you traveled from one

to the other and back, how many miles would you

have traveled?

- 3,004
- 2,954
- 6,004
- 3,854

Lesson 8 Ex3

Melody and her mother went to the botanical

gardens. Her ticket cost 7.50 and her mothers

ticket cost 14.75. Find the total cost.

To add money, add as you would with whole numbers.

Lesson 8 Ex3

1

1

Line up the decimal points.

14.75

Add.

7.50

5

2

2

2

.

Place the dollar sign in front of the dollars.

Place the decimal point in the answer.

Check for Reasonableness

Since 22.25 is close to the estimate of 25, the

answer is reasonable.

Lesson 8 CYP3

Theresa and her uncle went to the zoo. Her

ticket cost 9.50 and her uncles cost 21.25.

Find the total cost.

- 29.50
- 30.00
- 30.75
- 31.00

End of Lesson 8

CR Menu

Five-Minute Checks

Add Three-Digit Numbers

5Min Menu

Lesson 2-1 (over Chapter 1) Lesson 2-2 (over

Lesson 2-1) Lesson 2-3 (over Lesson 2-2) Lesson

2-4 (over Lesson 2-3) Lesson 2-5 (over Lesson

2-4) Lesson 2-6 (over Lesson 2-5) Lesson

2-7 (over Lesson 2-6) Lesson 2-8 (over Lesson 2-7)

5Min 1-1

(over Chapter 1)

Round 4,571 to the nearest thousand.

- 4,000
- 5,500
- 5,550
- 5,000

5Min 1-2

(over Chapter 1)

Round 1,278 to the nearest thousand.

- 1,000
- 1,200
- 100
- 1,300

5Min 1-3

(over Chapter 1)

Round 7,911 to the nearest thousand.

- 7,000
- 7,900
- 8,000
- 900

5Min 1-4

(over Chapter 1)

Round 5,449 to the nearest thousand.

- 5,000
- 5,500
- 6,000
- 5,400

5Min 2-1

(over Lesson 2-1)

Find the sum. Tell which property you used.

- 4 Commutative Property
- 14 Commutative Property
- 14 Associative Property
- 4 Associative Property

5Min 2-2

(over Lesson 2-1)

Find the sum. Tell which property you used.

- 6 Identity Property
- 6 Commutative Property
- 0 Associative Property
- 0 Commutative Property

5Min 2-3

(over Lesson 2-1)

Find the sum. Tell which property you used.

- 7 Associative Property
- 13 Identity Property
- 13 Associative Property
- 20 Associative Property

5Min 3-1

(over Lesson 2-2)

Tell whether you need an estimate or an exact

answer. Then solve. The school van holds 24

students. Mrs. Lazo has 9 girls and 17 boys in

her class. Will the van hold all of the students

in the class?

- estimate no
- estimate yes
- exact answer no
- exact answer yes

5Min 4-1

(over Lesson 2-3)

Estimate the sum using rounding.

37 41

- 70
- 90
- 80
- 60

5Min 4-2

(over Lesson 2-3)

Estimate the sum using rounding.

65 18

- 90
- 88
- 83
- 80

5Min 4-3

(over Lesson 2-3)

Estimate the sum using front-end estimation.

18 29

- 47
- 10
- 40
- 50

5Min 4-4

(over Lesson 2-3)

Estimate the sum using front-end estimation.

21 40

- 50
- 60
- 61
- 51

5Min 5-1

(over Lesson 2-4)

Find the sum.

37 4

- 41
- 40
- 33
- 34

5Min 5-2

(over Lesson 2-4)

Find the sum.

43 52

- 90
- 70
- 95
- 100

5Min 5-3

(over Lesson 2-4)

Find the sum.

58 23

- 71
- 83
- 81
- 91

5Min 5-4

(over Lesson 2-4)

Find the sum.

64 24

- 108
- 88
- 40
- 48

5Min 5-5

(over Lesson 2-4)

Find the sum.

17 18

- 45
- 11
- 34
- 35

5Min 6-1

(over Lesson 2-5)

Find the sum.

35 4

- 39
- 32
- 75
- 31

5Min 6-2

(over Lesson 2-5)

Find the sum.

18 28

- 36
- 46
- 48
- 10

5Min 6-3

(over Lesson 2-5)

Find the sum.

41 8

- 31
- 49
- 39
- 59

5Min 6-4

(over Lesson 2-5)

Find the sum.

47 26

- 80
- 83
- 73
- 74

5Min 6-5

(over Lesson 2-5)

Find the sum.

0.23 0.08

- 0.34
- 0.13
- 0.31
- 0.41

5Min 7-1

(over Lesson 2-6)

Use one of the problem-solving strategies to

solve. The farmer bought 19 cows in May and 26 in

June. Did he buy more than 40 cows in all?

- no
- yes

5Min 8-1

(over Lesson 2-7)

Find the sum. Use estimation to check for

reasonableness.

302 269

- 571
- 575
- 669
- 569

5Min 8-2

(over Lesson 2-7)

Find the sum. Use estimation to check for

reasonableness.

172 584

- 752
- 656
- 652
- 756

5Min 8-3

(over Lesson 2-7)

Find the sum. Use estimation to check for

reasonableness.

7.89 1.09

- 8.88
- 6.80
- 8.98
- 7.08

5Min 8-4

(over Lesson 2-7)

Find the sum. Use estimation to check for

reasonableness.

175 67

- 252
- 192
- 250
- 242

5Min 8-5

(over Lesson 2-7)

Find the sum. Use estimation to check for

reasonableness.

488 174

- 882
- 626
- 592
- 662

End of Custom Shows

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