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Title: Splash Screen

1
Splash Screen
2
2
• Lesson 2-2 Problem-Solving Skill Estimate or
• Lesson 2-3 Estimate Sums
• Lesson 2-6 Problem-Solving Investigation Choose
a Strategy
• Lesson 2-8 Add Greater Numbers

3
Five-Minute Check (over Chapter 1) Main Idea and
Vocabulary California Standards Key Concept
Properties Example 1 Example 2
4
Lesson 1 MI/Vocab
numbers.

5
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.
6
Lesson 1 Key Concept 1
7
Lesson 1 Ex1
Find the sum. Identify the property.
8
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
9
Lesson 1 CYP1
Which property is shown here? 4 3 3 4
1. Identity Property
2. Commutative Property
3. Associative Property
4. Personal Property

10
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.
11
Lesson 1 CYP2
Monica has 3 red crayons, 6 blue crayons, and 7
purple crayons. How many crayons does Monica
have in all?
1. 15
2. 16
3. 17
4. 18

12
End of Lesson 1
13
Five-Minute Check (over Lesson 2-1) Main Idea
California Standards Example 1 Problem-Solving
Skill
14
Lesson 2 MI/Vocab
• I will decide whether an estimate or an exact
answer is needed to solve a problem.

15
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.
16
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?
17
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.

18
Lesson 2 Ex1
Plan
You need to decide whether to estimate or find an
many trees were planted, you need to estimate.
19
Lesson 2 Ex1
Solve
First, find about how many trees were planted
each day. Estimate by rounding to the closest ten.
20
Lesson 2 Ex1
Solve
50
40

90
21
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.
22
End of Lesson 2
23
Five-Minute Check (over Lesson 2-2) Main Idea and
Vocabulary California Standards Example
1 Example 2 Example 3
24
Lesson 3 MI/Vocab
• I will estimate sums using rounding and front-end
estimation.
• estimate
• front-end estimation

25
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.
26
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.
27
Lesson 3 Ex1
40
28
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?
1. 27
2. 35
3. 20
4. 30

29
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
30
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.
1. 40
2. 41
3. 30
4. 50

31
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
circus floor.
32
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?
1. 49
2. 50
3. 40
4. 45

33
End of Lesson 3
34
Five-Minute Check (over Lesson 2-3) Main Idea and
Vocabulary California Standards Example 1 Example
2 Example 3
35
Lesson 4 MI/Vocab
• I will regroup ones and add two-digit numbers.
• regroup

36
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.
37
Lesson 4 Ex1
Jung found 17 seashells for his collection. His
mother found six more. How many seashells do they
have in all?
1
17
6

3
38
Lesson 4 Ex1
2
39
Lesson 4 CYP1
Jolene collected 19 rubber bands. John collected
8. How many rubber bands do they have in all?
1. 27
2. 25
3. 23
4. 30

40
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.
41
Lesson 4 Ex2
34
37

60
11

71
Check for Reasonableness
Compare 71 to the estimate. The answer is
reasonable.
42
Lesson 4 CYP2
In a survey of the third grade, we found out that
the total number of dogs and cats owned by the
1. 70
2. 60
3. 84
4. 72

43
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
44
Lesson 4 Ex3
Check for Reasonableness
Compare 98 to the estimate. The answer is
reasonable.
45
Lesson 4 CYP3
Find the sum of 45 33.
1. 80
2. 88
3. 78
4. 70

46
End of Lesson 4
47
Five-Minute Check (over Lesson 2-4) Main Idea and
Vocabulary California Standards Example 1 Example
2
48
Lesson 5 MI/Vocab
• I will learn to add money.
• dollar sign ()
• cents sign ()
• decimal point

49
Lesson 5 Standard 1
Standard 3NS3.3 Solve problems
and division of money amounts in decimal notation
and multiply and divide money amounts in decimal
notation by using whole-number multipliers and
divisors.
50
Lesson 5 Standard 2
Standard 3MR2.1 Use estimation to verify the
reasonableness of calculated results.
51
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.
52
Lesson 5 Ex1
7

Place the cents sign after the sum.
6
53
Lesson 5 Ex1
0.76
Answer So, Alicia paid 76 or 0.76 for the two
items.
54
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?
1. 90
2. 0.85
3. 0.88
4. 80

55
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.
56
Lesson 5 Ex2
1
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.
57
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?
1. 41
2. 31
3. 50
4. 51

58
End of Lesson 5
59
Five-Minute Check (over Lesson 2-5) Main
Idea California Standards Example 1
Problem-Solving Investigation
60
Lesson 6 MI/Vocab
• I will choose the best strategy to solve a
problem.

61
Lesson 6 Standard 1
Standard 3MR1.1 Analyze problems by identifying
relationships, distinguishing relevant from
irrelevant information, sequencing and
prioritizing information, and observing patterns.
62
Lesson 6 Standard 2
Standard 3NS2.1 Find the sum or
difference of two whole numbers between 0 and
10,000.
63
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.
64
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.

65
Lesson 6 Ex1
Plan
You need to find an exact answer. You can use
66
Lesson 6 Ex1
Solve
First, subtract to find out how many fish they
kept.
Hour One 9 4
5
Hour Two 16 9
7
67
Lesson 6 Ex1
Solve
Next, add the total for each hour.
Answer Kiri and her father caught and kept 12
fish.
68
Lesson 6 Ex1
Check
Look back at the problem. Yes, Kiri and her
father caught and kept at least 10 fish. They
caught 12.
69
End of Lesson 6
70
Five-Minute Check (over Lesson 2-6) Main
Idea California Standards Example 1 Example 2
71
Lesson 7 MI/Vocab
• I will add three-digit numbers and use estimation
to check for reasonableness.

72
Lesson 7 Standard
Standard 3NS3.3 Solve problems
and division of money amounts in decimal notation
and multiply and divide money amounts in decimal
notation by using whole-number multipliers and
divisors.
73
Lesson 7 Standard
Standard 3MR2.1 Use estimation to
verify the reasonableness of calculated results.
74
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
75
Lesson 7 Ex1
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
76
Lesson 7 Ex1
Check for Reasonableness
Since the answer 162 is close to the estimate of
77
Lesson 7 CYP1
Jesse used 143 minutes of his game trial Monday
and 47 minutes Tuesday. How many minutes has he
used altogether?
1. 200
2. 189
3. 190
4. 100

78
Lesson 7 Ex2
Celli bought a book for 4.13 and a bookmark for
2.48. How much did she spend?
1
3 ones 8 ones 11 ones
4.13
Regroup 11 ones as 1 ten and 1 ones.
2.48
1
79
Lesson 7 Ex2
1 ten 1 ten 4 tens 6 tens
6
4 hundreds 2 hundreds 6 hundreds
6.
80
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?
1. 9.01
2. 9.11
3. 10.05
4. 8.99

81
End of Lesson 7
82
Five-Minute Check (over Lesson 2-7) Main
Idea California Standards Example 1 Example
2 Example 3
83
Lesson 8 MI/Vocab/Standard 1
• I will add three- and four-digit numbers with
regrouping.

84
Lesson 8 Standard 1
Standard 3NS3.3 Solve problems
and division of money amounts in decimal notation
and multiply and divide money amounts in decimal
notation by using whole-number multipliers and
divisors.
85
Lesson 8 Standard 2
Standard 3MR2.1 Use estimation to
verify the reasonableness of calculated results.
86
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
87
Lesson 8 Ex1
One Way Partial Sums
11
110
900
5,000
6,021
88
Lesson 8 Ex1
Another Way Expanded Notation
5,000 900 110 11
900
110
11
6,021
89
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?
1. 7,225
2. 6,222
3. 8,032
4. 5,111

90
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
91
Lesson 8 Ex2
One Way Partial Sums
14
40
800
6,000
6,854
92
Lesson 8 Ex2
Another Way Expanded Notation
6,000 800 40 14
800
40
14
6,854
93
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?
1. 3,004
2. 2,954
3. 6,004
4. 3,854

94
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.
95
Lesson 8 Ex3
1
1
Line up the decimal points.
14.75
7.50

5
2
2
2

.
Place the decimal point in the answer.
Check for Reasonableness
Since 22.25 is close to the estimate of 25, the
96
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.
1. 29.50
2. 30.00
3. 30.75
4. 31.00

97
End of Lesson 8
98
Five-Minute Checks
99
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)
100
5Min 1-1
(over Chapter 1)
Round 4,571 to the nearest thousand.
1. 4,000
2. 5,500
3. 5,550
4. 5,000

101
5Min 1-2
(over Chapter 1)
Round 1,278 to the nearest thousand.
1. 1,000
2. 1,200
3. 100
4. 1,300

102
5Min 1-3
(over Chapter 1)
Round 7,911 to the nearest thousand.
1. 7,000
2. 7,900
3. 8,000
4. 900

103
5Min 1-4
(over Chapter 1)
Round 5,449 to the nearest thousand.
1. 5,000
2. 5,500
3. 6,000
4. 5,400

104
5Min 2-1
(over Lesson 2-1)
Find the sum. Tell which property you used.
1. 4 Commutative Property
2. 14 Commutative Property
3. 14 Associative Property
4. 4 Associative Property

105
5Min 2-2
(over Lesson 2-1)
Find the sum. Tell which property you used.
1. 6 Identity Property
2. 6 Commutative Property
3. 0 Associative Property
4. 0 Commutative Property

106
5Min 2-3
(over Lesson 2-1)
Find the sum. Tell which property you used.
1. 7 Associative Property
2. 13 Identity Property
3. 13 Associative Property
4. 20 Associative Property

107
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?
1. estimate no
2. estimate yes

108
5Min 4-1
(over Lesson 2-3)
Estimate the sum using rounding.
37 41
1. 70
2. 90
3. 80
4. 60

109
5Min 4-2
(over Lesson 2-3)
Estimate the sum using rounding.
65 18
1. 90
2. 88
3. 83
4. 80

110
5Min 4-3
(over Lesson 2-3)
Estimate the sum using front-end estimation.
18 29
1. 47
2. 10
3. 40
4. 50

111
5Min 4-4
(over Lesson 2-3)
Estimate the sum using front-end estimation.
21 40
1. 50
2. 60
3. 61
4. 51

112
5Min 5-1
(over Lesson 2-4)
Find the sum.
37 4
1. 41
2. 40
3. 33
4. 34

113
5Min 5-2
(over Lesson 2-4)
Find the sum.
43 52
1. 90
2. 70
3. 95
4. 100

114
5Min 5-3
(over Lesson 2-4)
Find the sum.
58 23
1. 71
2. 83
3. 81
4. 91

115
5Min 5-4
(over Lesson 2-4)
Find the sum.
64 24
1. 108
2. 88
3. 40
4. 48

116
5Min 5-5
(over Lesson 2-4)
Find the sum.
17 18
1. 45
2. 11
3. 34
4. 35

117
5Min 6-1
(over Lesson 2-5)
Find the sum.
35 4
1. 39
2. 32
3. 75
4. 31

118
5Min 6-2
(over Lesson 2-5)
Find the sum.
18 28
1. 36
2. 46
3. 48
4. 10

119
5Min 6-3
(over Lesson 2-5)
Find the sum.
41 8
1. 31
2. 49
3. 39
4. 59

120
5Min 6-4
(over Lesson 2-5)
Find the sum.
47 26
1. 80
2. 83
3. 73
4. 74

121
5Min 6-5
(over Lesson 2-5)
Find the sum.
0.23 0.08
1. 0.34
2. 0.13
3. 0.31
4. 0.41

122
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?
1. no
2. yes

123
5Min 8-1
(over Lesson 2-7)
Find the sum. Use estimation to check for
reasonableness.
302 269
1. 571
2. 575
3. 669
4. 569

124
5Min 8-2
(over Lesson 2-7)
Find the sum. Use estimation to check for
reasonableness.
172 584
1. 752
2. 656
3. 652
4. 756

125
5Min 8-3
(over Lesson 2-7)
Find the sum. Use estimation to check for
reasonableness.
7.89 1.09
1. 8.88
2. 6.80
3. 8.98
4. 7.08

126
5Min 8-4
(over Lesson 2-7)
Find the sum. Use estimation to check for
reasonableness.
175 67
1. 252
2. 192
3. 250
4. 242

127
5Min 8-5
(over Lesson 2-7)
Find the sum. Use estimation to check for
reasonableness.
488 174
1. 882
2. 626
3. 592
4. 662

128
End of Custom Shows
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