Practice the problems of Math in Focus Grade 1 Workbook Answer Key Chapter 13 Addition and Subtraction to 40 to score better marks in the exam.

## Math in Focus Grade 1 Chapter 13 Answer Key Addition and Subtraction to 40

**Put on Your Thinking Cap!**

**Challenging Practice**

**Fill in the circles with numbers.**

Question 1.

Answer:

Question 2.

Answer:

Question 3.

Luis places a ball into the number machine below. What happens to the number on the ball? Fill in the missing numbers.

Answer:

Given,

Number 9 by adding 20 to 9 we get 29,

By subtracting 2 from 29 we get 27.

Question 4.

Luis places another ball into the number machine below. What happens to the number on the ball?

Fill in the missing numbers.

Answer:

Given,

Number 15 by adding 5 to 15 we get 20,

By subtracting 13 from 20 we get 7.

**Put on Your Thinking Cap!**

**Problem Solving**

Dawn, Jamal and Nate go to an amusement park.

They buy tokens. Then they go for rides. Which rides do they take?

**Circle the correct rides.**

Question 1.

Dawn uses 15 tokens to go on two different rides. Roller Coaster Bumper Car Flying Elephant Merry-Go-Round

Answer:

Given,

Dawn uses 15 tokens to gon on two different rides,

Roller coaster ride is for 10 tokens,

Merry-Go-Round ride is 5 tokens,

By adding 10 with 5 we get 15,

Question 2.

Jamal uses 12 tokens to go on two different rides. Roller Coaster Bumper Car Flying Elephant Merry-Go-Round

Answer:

Given,

Jamal uses 12 tokens to go on two different rides,

Bumper car ride is for 7 tokens,

Merry-Go-Round ride is for 5 tokens,

By adding 7 with 5 we get 12.

Question 3.

Nate uses 21 tokens to go on three different rides. Roller Coaster Bumper Car Flying Elephant Merry-Go-Round

Answer:

Nate uses 21 tokens to go on three different rides,

Roller coaster ride is for 10 tokens,

Flying Elephant ride is for 6 tokens,

Merry-Go-Round ride is for 5 tokens,

By adding 10 with 6 we get 16 and then adding 16 with 5 we get 21.

**Chapter Review/Test**

**Vocabulary**

**Choose the correct word.**

Question 1.

You _________ from the greater number when you subtract.

Answer: You subtract smaller number from the greater number when you subtract.

Question 2.

You can _______ 13 ones into 1 ten 3 ones.

Answer: You can split 13 ones into 1 ten 3 ones.

Question 3.

You can add two numbers using the _______ method.

Answer: You can add two numbers using the sum method.

Question 4.

A _____________ can be used to add numbers.

Answer: A addition can be used to add numbers.

**Concepts and Skills**

**Add or subtract.**

Question 5.

32 + 7 = ______

Answer: 39

Question 6.

18 + 19 = ______

Answer: 37

Question 7.

27 – 3 = ______

Answer: 24

Question 8.

36 – 18 = ______

Answer: 18

Question 9.

4 + 8 + 6 = ______

Answer: 18

Question 10.

9 + 8 + 5 = ______

Answer: 22

**Problem Solving**

**Solve.**

Question 11.

Nicole blows up 30 balloons for a class party. Michael blows up 4 fewer balloons than Nicole. How many balloons does Michael blow up?

Michael blows up ___ balloons.

Answer:

Given,

Nicole blows up 30 balloons for a class party,

Michael blows up 4 fewer balloons than Nicole,

By subtracting 4 from 30 we get 26,

Therefore, Michael blows up 26 balloons.

Question 12.

Ryan has 23 bookmarks. He has 5 fewer bookmarks than Ivy. How many bookmarks does Ivy have?

Ivy has ___ bookmarks.

Answer:

Ryan has 23 bookmarks, He has 5 fewer bookmarks than Ivy,

By adding 5 from 23 we get 28,

Therefore, Ivy has 28 bookmarks.