## Math Expressions Common Core Grade 2 Unit 1 Lesson 10 Answer Key Add To and Take From Word Problems

**Math Expressions Grade 2 Unit 1 Lesson 10 Homework**

**Make a drawing. Write an equation. Solve the problem. Show your work.**

Question 1.

Brad has 14 toy boats. 5 of them float away. How many does he have now?

Answer:

9 boats

14 – 5 = 9

Explanation:

Total Toy boats = 14

Boats float away = 5

14 – 5 = 9

9 boats Brad has now

Question 2.

Moses collects 17 rocks. He gives some of them away. Now he has 9 rocks left. How many does he give away?

Answer:

8 rocks he give away

17 – 9 = 8

Explanation:

Moses has total 17 rocks

now he has 9 rocks

8 rocks he give away

17 – 8 = 9

Question 3.

Claire has 9 markers in her backpack. Some fall out on the way home. Now she has only 5 markers. How many markers fall out of her backpack?

Answer:

4 markers

9 – 4 = 5

Explanation:

Total markers = 9

Now markers left when reach home = 5

Number of markers she lost = 9 – 5

4 markers fall out of her backpack

Question 4.

A honeybee visits 7 flowers in the garden. Then it visits 5 more. How many flowers does the honeybee visit in all?

Answer:

12 flowers

7 + 5 = 12

Explanation:

Number of flowers visited by honey bees = 7

After some time she visits = 5 more

Total flowers visited by honey bees = 12

**Math Expressions Grade 2 Unit 1 Lesson 10 Remembering**

Question 1.

Write two equations for each Math Mountain.

Answer:

7 + 8 = 15 15 – 6 = 9 13 – 6 = 7

8 + 7 = 15 9 + 6 = 15 6 + 7 = 13

Explanation:

In the Math mountain, the top part of the mountain to called Total or Sum and it consists of two parts called Partners or Addends.

The addition of two whole numbers results in the total amount or sum of those values combined.

**Write the unknown addend (partner).**

Question 2.

5 + _______ = 11

13 – 8 = _______

15 – 6 = _______

Answer:

5 + 6 = 11

13 – 8 = 5

15 – 6 = 9

Explanation:

In the Math mountain, the top part of the mountain to called Total or Sum and it consists of two parts called Partners or Addends

The addition of two whole numbers results in the total amount or sum of those values combined.

Subtraction is opposite of addition.

**Add in any order. Write the total.**

Question 3.

5 + 3 + 5 = _______

7 + 8 + 3 = _______

2 + 9 + 7 = _______

Answer:

5 + 3 + 5 = 13

7 + 8 + 3 = 18

2 + 9 + 7 = 18

Explanation:

5 + 3 + 5 = 13

first add 5 to 5

5 + 5 = 10

then add 3 to 10

10 + 3 = 13

7 + 8 + 3 = 18

first add 3 to 7

7 + 3 = 10

then add 8 to 10

10 + 8 =18

2 + 9 + 7 = 18

First add sub divide to two parts 2 as 1 and 1

add 1 to 9

9 + 1 = 10

then add 1 to 7

7 + 1 =8

add 8 to 10

10 + 8 = 18

Question 4.

8 + 2 + 3 + 4 = _______

2 + 6 + 6 + 8 = _______

Answer:

8 + 2 + 3 + 4 = 17

2 + 6 + 6 + 8 = 22

Explanation:

8 + 2 + 3 + 4 =

First add 2 to 8 to get 10

8 + 2 = 10

then add 3 + 4 = 7

now the 7 is added to 10

10 + 7 = 17

hence, 8 + 2 + 3 + 4 = 17

2 + 6 + 6 + 8 =

first add 2 to 8 to get 10

8 + 2 = 10

then add 6 + 6 double

6 + 6 = 12

then add 12 to 10

10 + 12 = 22

hence, 2 + 6 + 6 + 8 = 22

Question 5.

**Stretch Your Thinking** Write a word problem to match this drawing.

Answer:

Jenna has 12 pens in her store, she sold 7 pens, now she left with 5 more pens only

12 – 7 = 5

Explanation:

In the Math mountain, the top part of the mountain to called Total or Sum and it consists of two parts called Partners or Addends

The addition of two whole numbers results in the total amount or sum of those values combined