LESSON OBJECTIVEchiayinglin.weebly.com/uploads/7/2/2/4/7224166/hw-review.pdfAngela drew 16 flowers...

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8 + 5 =

Step 1 Start with the greater addend. Break apart the other addend to make a ten.

8 + 5

Step 2 You need to add 2 to 8 to make a ten. So, break apart 5 as 2 and 3.

8 + 2 = 10 3

Step 3 Add on the rest to the 10. 10 + =

Step 4 Write the sum. 8 + 5 =

Show how you can make a ten to find the sum. Write the sum.

1. 7 + 6 =

3 3 10 + =

2. 9 + 2 =

1 1 10 + =

3. 4 + 8 =

2 2 10 + =

4. 5 + 9 =

10 + =

5. 8 + 6 =

10 + =

6. 4 + 9 =

10 + =

Algebra • Make a Ten to AddOBJECTIVE Recall sums for addition facts using the make a ten strategy.

LESSON 10

13313

?

Operations and Algebraic Thinking 19

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These are even numbers. They show pairs with no cubes left over.

4 is even. 6 is even. 8 is even. 10 is even.

These are odd numbers. They show pairs with 1 cube left over.

3 is odd. 5 is odd. 7 is odd. 9 is odd.

Count out the number of cubes. Make pairs. Then write even or odd.

1. 15 2. 11

3. 12 4. 13

5. 16 6. 14

Algebra • Even and Odd NumbersOBJECTIVE Classify numbers up to 20 as even or odd.

LESSON 15

Operations and Algebraic Thinking 29

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Algebra • Even and Odd NumbersShade in the ten frames to show the number. Circle even or odd.

1. 15

even odd

2. 18

even odd

3. 11

even odd

4. 17

even odd

5. 13

even odd

6. 20

even odd

Problem Solving

7. Mr. Dell has an odd number of sheep and an even number of cows on his farm. Circle the choice that could tell about his farm.

9 sheep and 10 cows

10 sheep and 11 cows

8 sheep and 12 cows

30 Lesson 15

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0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 are digits. A digit’s place in a number shows the value of the digit.

52 has two digits.

The digit is in the tens place.

The digit 5 shows tens.

Its value is .

The digit is in the ones place.

The digit 2 shows ones.

Its value is .

Circle the value of the underlined digit.

1. 27

20 2

2. 18

1 10

3. 56

60 6

4. 30

30 3

5. 75

5 50

6. 41

4 40

Understand Place ValueOBJECTIVE Use place value to describe the values of digits in 2-digit numbers.

LESSON 26

5 2

22

550

Number and Operations in Base Ten 51

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Show tens and ones in 43.

How many tens? tens How many ones? ones

is tens ones

is +

Describe the number in two ways.

1. 35

tens ones

+

2. 63

tens ones

+

3. 57

tens ones

+

4. 19

ten ones

+

Expanded FormOBJECTIVE Write 2-digit numbers in expanded form.

LESSON 27

Tens Ones

4

43

43 40 3

4 3

3


1

Tens Ones Tens Ones Tens Ones

B2 7

� 3 6

Tens Ones

B2 73

1

6

3

Tens Ones

+

B2 73

1

6

36

Tens Ones

+

B5 42 9

Tens Ones

+

B1 76 1

Tens Ones

+

B4 12 9

Tens Ones

+

B3 53 2

Tens Ones

+

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Add 27 and 36.

Model 27 and 36. Add the ones.7 + 6 = 13

If you can make a 10, regroup 10 ones for 1 ten.13 ones =1 ten 3 ones

Add the tens. Remember to add the regrouped ten.1 + 2 + 3 = 6

Regroup if you need to. Write the sum.

1. 2. 3. 4.

2-Digit AdditionOBJECTIVE Record 2-digit addition using the standard algorithm.

LESSON 36

STEP 1 STEP 2 STEP 3


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2-Digit AdditionRegroup if you need to. Write the sum.

1. 2. 3. 4.

5. 6. 7. 8.

9. 10. 11. 12.

Problem Solving

Solve. Write or draw to explain.

13. Angela drew 16 flowers on her paper in the morning. She drew 25 more flowers in the afternoon. How many flowers did she draw in all?

flowers

4 7 + 2 5

__

1 7 + 2 6

__

5 2 + 2 9

__

6 6 + 2 4

__

3 6 + 5 3

__

5 8 + 2 5

__

7 4 + 1 4

__

3 7 + 3 7

__

3 7 + 4 9

__

3 3 + 1 8

__

2 8 + 6 4

__

1 3 + 6 5

__

72 Lesson 36

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Add. 43 + 19 = ?

Rewrite the numbers. Then add.

1. 26 + 9

+

2. 16 + 43

+

3. 32 + 38

+

4. 23 + 26

+

Rewrite 2-Digit AdditionOBJECTIVE Rewrite horizontal addition problems vertically in the standard algorithm format.

LESSON 38

What is the tens digit in 43? Write 4 in the tens column. Write the ones digit, 3, in the ones column.

What is the tens digit in 19?

Write 1 in the tens column. Write the ones digit, 9, in the ones column.

Add the ones. Regroup if you need to.

Add the tens.

B4 3

+

Tens Ones

B4 3

1 9

Tens Ones

+

B4 31

1

9

26

Tens Ones

+


4 1


1

Tens Ones Tens Ones

3 1- 71

Tens Ones

4 3- 61

Tens Ones

Tens Ones

B B5 4

- 51

Tens Ones

Tens Ones

B B5

4 14

4- 51

Tens Ones

Tens Ones

B B5

4

3 9

14

4- 51

Tens Ones

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Subtract. 54 - 15

_

Are there enough

ones to subtract 5?

Regroup 1 ten as 10 ones.

Write the new number of tens and ones.

Subtract the ones.

14 ones - 5 ones = ones

Write that number in the ones place.

Subtract the tens.

4 tens - 1 ten = tens

Write that number in the tens place.

Draw a quick picture to solve. Write the difference.

1. 2.

Model and Record 2-Digit SubtractionOBJECTIVE Draw quick pictures and record 2-digit subtraction using the standard algorithm.

LESSON 41

no

9

3


1

41

3- 7

Tens Ones OnesTens

B B32

8- 9

Tens Ones OnesTens

B B53

2- 7

Tens Ones OnesTens

B B31

5- 9

Tens Ones TensOnesTens

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Model and Record 2-Digit SubtractionDraw a quick picture to solve. Write the difference.

1. 2.

3. 4.

Problem Solving


5. Kendall has 63 stickers. Her sister has 57 stickers. How many more stickers does Kendall have than her sister?

more stickers

82 Lesson 41

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Practice 2-Digit SubtractionOBJECTIVE Practice 2-digit subtraction with and without regrouping.

LESSON 43


Subtract in the ones column.

Subtract in the tens column.

More ones are needed. Regroup 8 tens 0 ones as 7 tens 10 ones.

Clay scored 80 points. Meg scored 61 points. How many more points did Clay score than Meg?

Write the difference.

1. 2. 3.

4. 5. 6.

8 0 - 6 1

7/ / 8 0

- 6 1

10 8 0

- 6 1

7 710 10

919

6 0 - 2 7

_

6 1 - 4 8

_

7 0 - 2 6

_

3 7 - 1 9

_

5 5 -1 4

_

3 7 - 2 2

_


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Practice 2-Digit SubtractionWrite the difference.

1. 2. 3.

4. 5. 6.

7. 8. 9.

Problem Solving


10. Julie has 42 sheets of paper. She gives 17 sheets to Kari. How many sheets of paper does Julie have now?

sheets of paper

5 0 - 1 8

_

4 3 - 1 7

_

7 5 - 1 8

_

2 2 - 6

_

6 0 - 3 5

_

6 1 - 3 7

_

3 9 - 2 7

_

2 1 - 8

_

4 2 - 3 4

_

86 Lesson 43

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Algebra • Find Sums for 3 AddendsOBJECTIVE Find sums of three 2-digit numbers.

LESSON 50

You can add three numbers in different ways. Start by adding the ones first.

So, 14 + 22 + 36 = 72.

Add.

1. 2. 3. 4.

Look at the column of ones digits. Choose two of the digits to add first. Then add the other digit.

Start at the top of the ones column. Add the first two digits, and then add the third digit.

14 22 + 36 ____

72

1

14 22 + 36 _____

72

1

4 + 6 = 10

10 + 2 =

4 + 2 = 6

6 + 6 = 12 12 Then add the tens.

1 + 1 + 2 + 3 = 7

Then add the tens.

1 + 1 + 2 + 3 = 7

18 25 + 32 ____

40 37 +16 ____

26 22 + 23 ____

13 21 + 34 ____


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Algebra • Find Sums for 3 AddendsAdd.

1. 2. 3.

4. 5. 6.

7. 8. 9.

Problem Solving


10. Liam has 24 yellow pencils, 15 red pencils, and 9 blue pencils. How many pencils does he have altogether?

pencils

23 20 + 25 ____

15 22 + 38 ____

13 52 + 34 ____

27 40 + 19 ____

31 45 + 24 ____

34 11 + 28 ____

18 22 + 34 ____

42 36 + 11 ____

53 19 + 25 ____

100 Lesson 50

LESSON OBJECTIVEchiayinglin.weebly.com/uploads/7/2/2/4/7224166/hw-review.pdfAngela drew 16 flowers...

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