We included **HMH Into Math Grade 1 Answer Key PDF** **Module 13 Lesson 6 Practice Two-Digit Addition and Subtraction **to make students experts in learning maths.

## HMH Into Math Grade 1 Module 13 Lesson 6 Answer Key Practice Two-Digit Addition and Subtraction

I Can add and subtract with two-digit numbers.

**Step It Out**

Question 1.

Mia has a number that is 20 less than the number Tom has. Tom has a number with 3 tens and 0 ones. What number does Mia have?

A. Start with the number Tom has.

THINK: 3 tens 0 ones

The number Tom has is __________.

Answer:

B. Find the number Mia has.

THINK: The number Mia has is 20 less than the number Tom has.

Equation: ___________

Answer:

C. The number Mia has is ___________.

Answer:

Mia has a number that is 20 less than the number Tom has

Tom has a number with 3 tens and 0 ones

3 tens 0 ones is 30

Tom has 30

The number Mia has is 20 less than the number Tom has

30 – 20 = 10

So, the number Mia has is 10.

Question 2.

Tony and Mord pack box lunches for the class picnic. Tony packs 9 more boxes than Marci. Mord packs 26 boxes. How many boxes does Tony pack?

A. What information do you need to use?

Marci packs _________ boxes.

Tony packs _________ more boxes than Marci.

Answer:

B. Will you odd or subtract to solve the problem?

Answer:

C. Write an equation.

Answer:

D. Tony packs __________ boxes.

Answer:

Tony and Mord pack box lunches for the class picnic

Tony packs 9 more boxes than Marci

Mord packs 26 boxes

I will add to find the sum of 26 and 9

26 + 9 =

Start at 26, count on 9 more

I stop at 35

So, 26 + 9 = 35

Tony packs 35 boxes.

**Turn and Talk** What strategy did you use to solve the problem?

Answer:

**Check Understanding**

**Add or subtract to solve.**

Question 1.

Jason puts 70 carrots on a plate. Friends eat 50 of them. How many carrots are on the plate now?

__________ carrots

Answer:

20 carrots

Explanation:

Jason puts 70 carrots on a plate

Friends eat 50 of them

70 – 50 =

Start at 70, count back by 10’s till 50

70 before 60, 50

I counted 2 tens

So, 70 – 50 = 20

20 carrots are on the plate now.

**On Your Own**

**Add or subtract to solve.**

Question 2.

**Reason** Lexi makes 24 shapes. Kwesi makes 41 shapes. How many shapes do they make together?

_________ shapes

Answer:

65 shapes

Explanation:

Lexi makes 24 shapes

Kwesi makes 41 shapes

24 + 41 =

24 + 1 + 40

25 + 40

Start at 25, count on by 10’s 4 times

I stop at 65

So, 24 + 41 = 65

They make 65 shapes altogether.

Question 3.

**Open-Ended** Ada reads 55 pages of her book. She reads some before lunch and some after lunch. How many pages could she read at each time?

Equation: __________

__________ pages before lunch

__________ pages after lunch

Answer:

30 + 25 = 55

30 pages before lunch

25 pages after lunch

Explanation:

Ada reads 55 pages of her book

She reads some before lunch and some after lunch

Ada can read 30 pages before and 25 pages after lunch

30 + 25 = 55

So, she could have read 30 and 25 pages.

Question 4.

__________ = 41 + 9

Answer:

50 = 41 + 9

Explanation:

41 + 9 =

Start at 41 count 9 more

I reach at 50

The sum of 41 and 9 is 50

So, 41 + 9 = 50.

Question 5.

77 + 8 = __________

Answer:

77 + 8 = 85

Explanation:

Start at 77, count 8 more

I reach at 85

The sum of 77 and 8 is 85

So, 77 + 8 = 85.

Question 6.

Answer:

Explanation:

The difference of 50 and 50 is 0

So, 50 – 50 = 0.

Question 7.

Answer:

Explanation:

The sum of 30 and 48 is 78

30 + 48 = 78.

Question 8.

Answer:

Explanation:

The difference of 70 and 10 is 60

So, 70 – 10 = 60.

Question 9.

Answer:

Explanation:

The sum of 24 and 37 is 61

So, 24 + 3 7 = 61.

Question 10.

Answer:

Explanation:

The sum of 35 and 52 is 87

So, 35 + 52 = 87.

Question 11.

Answer:

Explanation:

The sum of 38 and 55 is 93

So, 38 + 55 = 93.

Question 12.

Answer:

Explanation:

The sum of 77 and 22 is 99

So, 77 + 22 = 99.

Question 13.

Answer:

Explanation:

The difference of 80 and 50 is 30

So, 80 – 50 = 30.

**Reason Add or subtract to solve.**

Question 14.

Adam has 7 more stickers than Dan. Dan has 37 stickers. How many stickers does Adam have?

___________ stickers

Answer:

44 stickers

Explanation:

Adam has 7 more stickers than Dan

Dan has 37 stickers

37 + 7 =

Start at 37, count on 7 more

I reach at 44

So, Adam have 44 stickers.

Question 15.

Mario and Pete each have 40 rocks in their collection. How many rocks do Mario and Pete have?

________ rocks

Answer:

80 rocks

Explanation:

Mario and Pete each have 40 rocks in their collection

40 + 40 =

Doubles fact:

40 + 40 = 80

So, Mario and Pete have 80 rocks .

Question 16.

Kendra has 50 paper clips. She gives some to Sara. Now Kendra has 20 paper clips. How many does she give to Sara? Does your answer make sense? Explain.

__________ paper clips

Answer:

30 paper clips

Explanation:

Kendra has 50 paper clips

She gives some to Sara

Now Kendra has 20 paper clips

50 – 20 =

Start at 50 count back by 10’s till 20

I counted 3 tens

30, 40, 50

So, 50 – 20 = 30

Kendra gave 30 paperclips to Sara.

Question 17.

__________ = 30 + 15

Answer:

45 = 30 + 15

Explanation:

30 + 15 =

Start at 30, count by 5’s

Count 3 times

30 after 35, 40, 45

So, 30 + 15 = 45.

Question 18.

33 + 25 = __________

Answer:

33 + 25 = 58

Explanation:

Start at 33 count by 5’s

Count 5 times

33, 38, 43, 48, 53, 58

So, 33+ 28 = 58.

Question 19.

___________ = 70 – 40

Answer:

30 = 70 – 40

Explanation:

Start at 40 count on by 10’s till 70

I counted 3 tens

50, 60, 70

So, 70 – 40 = 30.

Question 20.

28 + 7 = __________

Answer:

28 + 7 = 35

Explanation:

28 + 7 =

Start at 28, count 7 more

The number is 35

So, 28 + 7 = 35.

Question 21.

Answer:

Explanation:

The sum of 41 and 58 is 99

So, 41 + 58 = 99.

Question 22.

Answer:

Explanation:

The difference of 60 and 20 is 40

So, 60 – 20 = 40.

Question 23.

Answer:

Explanation:

The sum of 22 and 63 is 85

So, 22 + 63 = 85.

Question 24.

Answer:

Explanation:

The sum of 43 and 16 is 59

So, 43 + 16 = 59.