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Splash Screen

Chapter Menu

- Lesson 2-1 Algebra Addition Properties and

Subtraction Rules - Lesson 2-2 Estimate Sums and Differences
- Lesson 2-3 Problem-Solving Strategy Estimate or

Exact Answer - Lesson 2-4 Add Numbers
- Lesson 2-5 Subtract Numbers
- Lesson 2-6 Problem-Solving Investigation Choose

a Strategy - Lesson 2-7 Subtract Across Zeros

Lesson 1 Menu

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

Vocabulary California Standards Key Concepts

Addition Properties Key Concepts Subtraction

Rules Example 1 Use Addition Properties Example

2 Use Addition Properties to Add Example 3 Use

Subtraction Rules

Lesson 1 MI/Vocab

- I will use addition properties and subtraction

rules to add and subtract.

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

Lesson 1 Standard 1

Standard 4AF1.0 Students use and interpret

variables, mathematical symbols, and properties

to write and simplify expressions and sentences.

Lesson 1 Key Concept 1

Lesson 1 Key Concept 2

Lesson 1 Ex1

Identify the property shown by 9 6 6 9.

The same numbers are being added on each side of

the equal sign, but they are in a different

order. This is the Commutative Property of

Addition because the order in which numbers are

added does not change the sum.

Answer Commutative Property of Addition

Lesson 1 CYP1

Identify the property shown by (2 3) 4 2

(3 4).

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

Lesson 1 Ex2

Find (18 26) 12.

You can use the Associative Property to add

mentally.

(26 18) 12

Commutative Property of Addition

26 (18 12)

Associative Property of Addition

26 30

Add 18 and 12.

56

Add 26 and 30.

Answer 56

Lesson 1 CYP2

Find (13 31) 17.

- 30
- 44
- 61
- 52

Lesson 1 Ex3

When you subtract 0 from 5, the result is 5.

5 0 5

Answer So, the missing number is 0.

Lesson 1 CYP3

- 7
- 0
- 1
- 2

End of Lesson 1

Lesson 2 Menu

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

Vocabulary California Standards Example 1

Estimate Sums Example 2 Estimate Sums Example 3

Estimate Differences Example 4 Estimate

Differences

Lesson 2 MI/Vocab

- I will estimate sums and differences of numbers.

- estimate

Lesson 2 Standard 1

Standard 4NS3.1 Demonstrate an

understanding of, and the ability to use,

standard algorithms for the subtraction of

multidigit numbers.

Lesson 2 Ex1

Sam wanted to buy a bicycle for 239 and a helmet

for 37. About how much money will Sam need to

buy the bicycle and helmet? Round to the tens

place.

Round each amount to the nearest tens place. Then

add.

280

Answer So, Sam needs to save about 280.

Lesson 2 CYP1

Olivia wants to buy a desk for 217 and a chair

to go with it for 56. About how much money does

Olivia need to buy the desk and chair? Round to

the nearest tens place.

- 260
- 270
- 275
- 280

Lesson 2 Ex2

Estimate 6,243 942. Round to the hundreds place.

Round to the nearest hundreds place. Then add.

7,100

Answer So, 6,243 942 is about 7,100.

Lesson 2 CYP2

Estimate 6,837 821. Round to the hundreds place.

- 7,800
- 7,700
- 7,600
- 7,500

Lesson 2 Ex3

Estimate 57.61 28.45. Round to the tens place.

Round each dollar amount to the nearest ten

dollars then subtract.

30.00

Answer So, 57.61 28.45 is about 30.00.

Lesson 2 CYP3

Estimate 25.72 17.55. Round to the tens place.

- 40.00
- 10.00
- 20.00
- 30.00

Lesson 2 Ex4

The table shows the worlds tallest mountains.

About how much taller is Mt. Everest than Lhoste?

Round to the thousands place.

Lesson 2 Ex4

Round each height to the nearest thousand. Then

subtract.

1,000

Answer So, Mt. Everest is about 1,000 feet

taller than Lhoste.

Lesson 2 CYP4

Estimate 74,218 51,933. Round to the thousands

place.

- 22,000
- 23,000
- 22,700
- 23,700

End of Lesson 2

Lesson 3 Menu

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

Idea California Standards Example 1

Problem-Solving Strategy

Lesson 3 MI/Vocab

- I will determine when to estimate or find an

exact answer.

Lesson 3 Standard 1

Standard 4NS1.4 Decide when a rounded

solution is called for and explain why such a

solution may be appropriate.

Standard 4MR2.5 Indicate the relative advantages

of exact and approximate solutions to problems

and give answers to a specified degree of

accuracy.

Lesson 3 Ex1

Keith and his brother are going to build a tree

house. They will need 12 for nails, 95 for

tools, and 46 for wood. About how much money do

they need to build the tree house?

Lesson 3 Ex1

Understand

What facts do you know?

- Nails cost 12.
- Tools cost 95.
- Wood costs 46.

What do you need to find?

- Find about how much money they need to build the

tree house.

Lesson 3 Ex1

Plan

Since the question asks about how much money is

needed, you can estimate the sum.

Lesson 3 Ex1

Solve

Round each amount to each greatest place value.

Then add.

12 95 46

10 100 50

160

Answer So, about 160 is needed to build the

tree house.

Lesson 3 Ex1

Check

Look back at the problem. Suppose the question

asked for an exact answer.

Since 153 is close to 160, an estimate of 160

is correct.

End of Lesson 3

Lesson 4 Menu

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

Idea California Standards Example 1 Add Whole

Numbers Example 2 Add Multi-Digit Numbers

Lesson 4 MI/Vocab

- I will add numbers, including multidigit numbers.

Lesson 4 Standard 1

Standard 4NS3.1 Demonstrate an

understanding of, and the ability to use,

standard algorithms for the addition and

subtraction of multidigit numbers.

Lesson 4 Ex1

Add 4,568 2,429.

Estimate

Lesson 4 Ex1

Step 1 Add ones.

1

7

Step 2 Add tens.

9

Lesson 4 Ex1

Step 3 Add hundreds.

9

Lesson 4 Ex1

Step 4 Add thousands.

6,

Answer So, 4,568 2,429 6,997.

Check for Reasonableness

The estimate was 7,000. Since 6,997 is close to

the estimate, the answer is reasonable.

Lesson 4 CYP1

Add 3,792 5,249.

- 9,041
- 8,931
- 9,000
- 9,040

Lesson 4 Ex2

The three largest farms in Springfield are listed

in the table. What is the total size of the three

farms?

Estimate

Lesson 4 Ex2

Step 1 Add ones.

9

Step 2 Add tens.

1

7

Lesson 4 Ex2

Step 3 Add hundreds.

1

9

Step 4 Add thousands.

1

1,

Lesson 4 Ex2

Step 5 Add ten thousands.

2

Answer The total size of the three farms is

21,979 acres.

Check for Reasonableness

The estimate was 22,000. Since 21,979 is close to

the estimate, the answer is reasonable.

Lesson 4 CYP2

Add 33,473 4,522 722.

- 38,771
- 37,117
- 38,717
- 37,617

End of Lesson 4

Lesson 5 Menu

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

Idea California Standards Example 1 Subtract

Whole Numbers Example 2 Subtract Money

Subtract Numbers

Lesson 5 MI/Vocab

- I will subtract multidigit numbers.

Lesson 5 Standard 1

Standard 4NS3.1 Demonstrate an

understanding of, and the ability to use,

standard algorithms for the addition and

subtraction of multidigit numbers.

Lesson 5 Ex1

The Hernandez family flies 9,635 miles to visit

some cousins. Next year, they fly 3,867 miles to

visit their grandmother. How much farther did

they travel to see their cousins?

Estimate

Lesson 5 Ex1

Step 1 Subtract ones.

2

15

8

Step 2 Subtract tens.

12

5

6

Lesson 5 Ex1

Step 3 Subtract hundreds.

15

8

7

Step 4 Subtract thousands.

5,

Lesson 5 Ex1

Answer So, the Hernandez family traveled 5,768

miles further to see their cousins.

Check

You can use addition to check your subtraction.

The answer is correct and close to the estimate.

Lesson 5 CYP1

Subtract 8,249 2,871.

- 6,487
- 5,378
- 6,789
- 5,738

Lesson 5 Ex2

Elija had 96.47 in his checking account. He

wrote a check for 67.99 to buy a skateboard. How

much money did he have left?

Subtracting money is similar to subtracting whole

numbers.

Estimate

Lesson 5 Ex2

Step 1 Subtract pennies.

17

3

8

Step 2 Subtract dimes.

13

5

4

Lesson 5 Ex2

Step 3 Subtract dollars.

15

8

8.

Step 4 Subtract ten dollars.

2

Answer Elija had 28.48 left.

Lesson 5 Ex2

Check

The answer is correct and close to the estimate.

Lesson 5 CYP2

Selena had 45.50 when she went to the store. She

bought shoes for 36.99. How much does she have

left?

- 10.51
- 9.50
- 8.51
- 8.49

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 4MR1.1 Analyze problems by identifying

relationships, distinguishing relevant from

irrelevant information, sequencing and

prioritizing information, and observing patterns.

Lesson 6 Standard 2

Standard 4NS3.0 Students solve problems

involving addition, subtraction, multiplication,

and division of whole numbers and understand the

relationships among the operations.

Lesson 6 Ex1

MARCO I am downloading music. So far, I have

downloaded 4 albums. Each album has 14

songs. YOUR MISSION Find how many songs Marco

has downloaded.

Lesson 6 Ex1

Understand

What facts do you know?

- Marco has downloaded 4 albums.
- Each album has 14 songs.

What do you need to find?

- Find how many songs Marco has downloaded.

Lesson 6 Ex1

Plan

You can organize the information in a table and

use repeated addition to find how many songs

Marco has downloaded.

Lesson 6 Ex1

Solve

Start with 14, the number of songs on the first

album. Then continue to add 14 for each

additional album.

14 14 28

Lesson 6 Ex1

Solve

42 14 56

Answer So, he downloaded a total of 56 songs.

Lesson 6 Ex1

Check

Look back at the problem.

56 14 42, 42 14 28, 28 14 14, and 14

14 0.

The answer is correct.

End of Lesson 6

Lesson 7 Menu

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

Idea California Standards Example 1 Subtract

Across Zeros Example 2 Subtract Across Zeros

Lesson 7 MI/Vocab

- I will subtract multidigit numbers, when some

digits are zero.

Lesson 7 Standard

Standard 4NS3.1 Demonstrate an

understanding of, and the ability to use,

standard algorithms for the addition and

subtraction of multidigit numbers.

Lesson 7 Ex1

Refer to the table. How much larger is Jupiter

than Earth?

Step 1 Subtract ones.

9

10

10

1

4

Lesson 7 Ex1

Step 2 Subtract tens.

4

Step 3 Subtract hundreds.

11

1

4

Lesson 7 Ex1

Step 4 Subtract thousands.

11

3

9,

Step 5 Subtract ten thousands.

2

Lesson 7 Ex1

Step 6 Subtract hundred thousands.

1

Answer So, Jupiter is 129,444 km larger than

Earth.

Check

You can use addition to check your subtraction.

12,756 129,444 142,200. So, the

answer is correct.

Lesson 7 CYP1

Subtract 132,788 64,329.

- 68,599
- 68,459
- 67,461
- 67,459

Lesson 7 Ex2

Marciel gave the store clerk 50.00 for her

purchase. She received 13.56 in change. How much

did she spend?

Step 1 Subtract pennies.

9

9

4

10

10

10

4

Lesson 7 Ex2

Step 2 Subtract dimes.

4

Step 3 Subtract ones.

6.

Lesson 7 Ex2

Step 4 Subtract tens.

3

Answer So, Marciel spent 36.44.

Lesson 7 CYP2

Seki bought some headphones at the mall. If he

took 35.00 with him and has 13.74 left, how

much did the headphones cost?

- 21.26
- 22.76
- 22.27
- 21.76

End of Lesson 7

CR Menu

Addition and Subtraction

2

Five-Minute Checks Math Tool Chest Image Bank

Subtract Numbers

IB Instructions

To use the images that are on the following four

slides in your own presentation 1. Exit this

presentation. 2. Open a chapter presentation

using a full installation of Microsoft

PowerPoint in editing mode and scroll to the

Image Bank slides. 3. Select an image, copy it,

and paste it into your presentation.

IB 1

IB 2

IB 3

IB 4

5Min Menu

Addition and Subtraction

2

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)

5Min 1-1

(over Chapter 1)

Use any strategy to solve. Tell which strategy

you used. Lee Anns family travels 60 miles in

one hour. Robertos family travels 40 miles in

one hour. How many hours would it take for Lee

Anns family to travel as far as Robertos family

travels in 6 hours?

A. Robertos family travels 200 miles in 6

hours it will take Lee Anns family 4 hours to

travel 200 miles.

B. Robertos family travels 2,400 miles in 6

hours it will take Lee Anns family 4 hours to

travel 2,400 miles.

5Min 1-1

(over Chapter 1)

C. Robertos family travels 240 miles in 6

hours it will take Lee Anns family 4 hours to

travel 240 miles.

D. Robertos family travels 280 miles in 6

hours it will take Lee Anns family 5 hours to

travel 280 miles.

5Min 1-1

(over Chapter 1)

Answer

C. Robertos family travels 240 miles in 6

hours it will take Lee Anns family 4 hours to

travel 240 miles.

5Min 2-1

(over Lesson 2-1)

Copy and complete the number sentence. Write the

property or rule shown.

7 __ 7

- 0 Associative Property
- 0 Identity Property
- 7 Identity Property
- 1 Commutative Property

5Min 2-2

(over Lesson 2-1)

Copy and complete the number sentence. Write the

property or rule shown.

(9 2) 7 9 (__ 7)

- 9 Associative Property
- 2 Commutative Property
- 2 Associative Property
- 7 Associative Property

5Min 2-3

(over Lesson 2-1)

Copy and complete the number sentence. Write the

property or rule shown.

4 __ 0

- 4 Subtraction Rule
- 0 Identity Property
- 0 Subtraction Rule
- 4 Identity Property

5Min 2-4

(over Lesson 2-1)

Copy and complete the number sentence. Write the

property or rule shown.

385 22 22 __

- 385 Associative Property
- 385 Identity Property
- 22 Commutative Property
- 385 Commutative Property

5Min 3-1

(over Lesson 2-2)

Estimate 4.69 5.19.

- 9.00
- 11.00
- 10.00
- 9.50

5Min 3-2

(over Lesson 2-2)

Estimate 20.59 17.19.

- 3.00
- 38.00
- 5.00
- 4.00

5Min 3-3

(over Lesson 2-2)

Estimate 2,466 1,377.

- 2,000
- 1,100
- 1,400
- 3,000

5Min 3-4

(over Lesson 2-2)

Estimate 19,556 14,789.

- 34,000
- 5,000
- 35,000
- 33,000

5Min 3-5

(over Lesson 2-2)

Estimate 555 798.

- 1,400
- 1,350
- 1,300
- 1,200

5Min 4-1

(over Lesson 2-3)

Solve. Explain why you gave an estimate or an

exact answer. A turkey sandwich costs 3.75 and a

bottle of juice costs 1.45. If Tobin buys two

sandwiches and a bottle of juice, how much change

will he receive from 10.00?

A. 1.00 estimate because the question asks

about an estimated amount of change

B. 1.05 exact answer because the question asks

about an exact amount of change

5Min 4-1

(over Lesson 2-3)

C. 0 estimate because you always estimate when

using money

D. 2.05 exact answer because the question asks

about an exact amount of change

5Min 4-1

(over Lesson 2-3)

Answer

B. 1.05 exact answer because the question asks

about an exact amount of change

5Min 5-1

(over Lesson 2-4)

Find 568 29. Check you work by estimating.

- 578
- 607
- 597
- 600

5Min 5-2

(over Lesson 2-4)

Find 478 245. Check you work by estimating.

- 823
- 734
- 712
- 723

5Min 5-3

(over Lesson 2-4)

Find 8,238 676. Check you work by estimating.

- 8,804
- 8,914
- 8,924
- 9,004

5Min 5-4

(over Lesson 2-4)

Find 4,765 3,482. Check you work by estimating.

- 8,247
- 8,337
- 8,547
- 8,257

5Min 5-5

(over Lesson 2-4)

Find 54,763 2,788. Check you work by estimating.

- 56,551
- 57,561
- 56,651
- 57,551

5Min 6-1

(over Lesson 2-5)

Solve. Nori bought a game for 14.95 and a CD for

9.88. He gave the cashier 30.00. How much

change did he receive?

- 6.27
- 5.17
- 15.17
- 5.16

5Min 6-2

(over Lesson 2-5)

Solve. Nadia guessed that there were 9,546 beans

in a jar. Steve guessed that there were 5,969

beans. How much larger was Nadias guess than

Steves?

- 4,423
- 6,423
- 4,577
- 3,577

5Min 7-1

(over Lesson 2-6)

Use any of the following strategies to solve

draw a picture, look for a pattern, make a table.

Tiana writes the following numbers in a row 2,

7, 9, 14, 16. What would be the next three

numbers in her pattern?

- 21, 23, 28
- 18, 23, 25
- 18, 20, 22
- 21, 26, 31

End of Custom Shows

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