lesson 5.4 name model and record 2-digit

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Listen and DrawListen and Draw

MATHEMATICAL PRACTICES 6MathTalk

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Model and Record 2-Digit SubtractionEssential Question How do you record 2-digit subtraction?

Lesson 5.4

Use to model the problem. Draw quick pictures to show your model.

FOR THE TEACHER • Read the following problem. Mr. Kelly made 47 muffins. His students ate 23 of the muffins. How many muffins were not eaten?

Number and Operations in Base Ten—2.NBT.B.5 Also 2.NBT.B.9

MATHEMATICAL PRACTICESMP1, MP4, MP6

Explain a Method Did you trade blocks in your model? Explain why or why not.

Tens OnesTens Ones

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B B5 6

92 1

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B B5 6

92 1

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4 16 B B5 6

92 1

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4

7

16 B B5 6

92 1

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73

16

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Model and DrawModel and Draw

Share and ShShare and ShShare and Showhowhhowhow MATHBOARDMATHBOARDMBMATHBOARDMATHMATHMATHBOARDBOARDBOARD

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1. 2.

Trace over the quick pictures in the steps.

Subtract. 56 −1 9

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Draw a quick picture to solve. Write the difference.

Step 1 Show 56. Are there enough ones to subtract 9?

Step 2 If there are not enough ones, regroup 1 ten as 10 ones.

Step 3 Subtract the ones.

16 − 9 = 7

Step 4 Subtract the tens.

4 − 1 = 3

B B 3 2

− 1 8

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B B 4

7

− 1 5

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3. 4.

5. 6.

B B 3

5

− 2 9

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B B 2

8

− 5

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B B 3

2

− 1 3

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B B 5

3

− 2 6

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On Your OwnOn Your Own

7. DEEPER There are 16 robins in the trees. 24 more fly in. Then 28 robins fly away. How many robins are still in the trees? —— robins

MathMath

MATHEMATICAL PRACTICES COMMUNICA C

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— people

8. SMARTER Claire’s puzzle has 85 pieces. She has used 46 pieces so far. How many puzzle pieces have not been used yet?

9. MATHEMATICALPRACTICE 1 Analyze There were

some people at the park. 24 people went home. Then there were 19 people at the park. How many people were at the park before?

— puzzle pieces

TAKE HOME ACTIVITY • Write 73 − 28 on a sheet of paper. Ask your child if he or she would regroup to find the difference.

10. SMARTER Mr. Sims has a box of 44 erasers. He gives 28 erasers to his students. How many erasers does Mr. Sims have now?

Show how you solved the problem.

— erasers

Problem SolvingProblem Solving

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B B4

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3

2 7

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B B3

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8

2 9

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Model and Record 2-Digit Subtraction


Chapter 5 three hundred thirty-nine 339

more stickers

Solve. Write or draw to explain.

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

4. Math Draw a quick picture to show the number 24. Then draw a quick picture to show 24 after you have regrouped 1 ten as 1-ones. Explain how both pictures show the same number, 24.

COMMON CORE STANDARD—2.NBT.B.5 Use place value understanding and properties of operations to add and subtract.

Lesson 5.4Practice and Homework

Personal Math Trainer

FOR MORE PRACTICE GO TO THE

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Lesson Check (2.NBT.B.5)

1. What is the difference?

B B4

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7

2 8

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B B3

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3

2 9

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Spiral Review (2.OA.B.2, 2.NBT.B.5, 2.NBT.B.6)


10 − 6 = —

4. What is the sum?

16 + 49 = —

5. What is the sum?

28 + 8 = —


52 − 6 = —

lesson 5.4 name model and record 2-digit

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