Practicing the **Bridges in Mathematics Grade 2 Home Connections Answer Key Unit 7 Module 4** will help students analyze their knowledge of concepts.

## Bridges in Mathematics Grade 2 Home Connections Answer Key Unit 7 Module 4

**Bridges in Mathematics Grade 2 Home Connections Unit 7 Module 4 Session 2 Answer Key**

**Equations & Story Problems**

Question 1.

Fill in the missing numbers.

a. 15 = ___________ + 7

Answer:

15 = _____8______ + 7.

Explanation:

Missing numbers:

15 = ?? + 7

=> 15 – 7 = ??

=> 8 = ??.

b. 5 + ___________ = 13

Answer:

5 + ____8_______ = 13.

Explanation:

Missing numbers:

5 + ?? = 13.

?? = 13 – 5

?? = 8.

c. 14 – ___________ = 8

Answer:

14 – ____6_______ = 8.

Explanation:

Missing numbers:

14 – ?? = 8.

14 – 8 = ??

6 = ??.

d. 16 – ___________ = 7

Answer:

16 – ____9_______ = 7.

Explanation:

Missing numbers:

16 – ___________ = 7.

16 – 7 = ??

9 = ??.

e. 9 + 6 = ___________ + 8

Answer:

9 + 6 = _____6______ + 8.

Explanation:

Missing numbers:

9 + 6 = ___________ + 8.

14 = ?? + 8

14 – 8 = ??

6 = ??.

f. 12 – 5 = 4 + ___________

Answer:

12 – 5 = 4 + ____3_______.

Explanation:

Missing numbers:

12 – 5 = 4 + ??

7 = 4 + ??

7 – 4 = ??

3 = ??.

g. 13 – 7 = 3 + ___________

Answer:

13 – 7 = 3 + ____3_______.

Explanation:

Missing numbers:

13 – 7 = 3 + ??

6 = 3 + ??

6 – 3 = ??

3 = ??

Question 2.

Fill in the missing numbers.

40 + 50 = ___________

30 + ___________ = 60

___________ + 70 = 90

25 + 35 = ___________

25 + ___________ = 50

___________ + 40 = 85

80 – 40 = ___________

70 – ___________ = 20

___________ – 30 = 30

95 – 40 = ___________

55 – ___________ = 35

___________ – 25 = 25

Answer:

Missing numbers:

40 + 50 = ____90_______.

30 + ___30________ = 60.

_____20______ + 70 = 90.

25 + 35 = ____60_______.

25 + ____25_______ = 50.

____45_______ + 40 = 85.

80 – 40 = ____40_______.

70 – ____50_______ = 20.

_____60______ – 30 = 30.

95 – 40 = __55_________.

55 – _____20______ = 35.

_____50______ – 25 = 25.

Explanation:

Missing numbers in equations:

40 + 50 = ??

=> 40 + 50 = 90.

30 + ?? = 60.

=> ?? = 60 – 30

=> ?? = 30.

?? + 70 = 90.

=> ?? = 90 – 70

=> ?? = 20.

25 + 35 = ??

=> 60 = ??

25 + ?? = 50.

=> ?? = 50 – 25

=> ?? = 25.

?? + 40 = 85.

=> ?? = 85 – 40

=> ?? = 45.

80 – 40 = ??

=> 40 = ??.

70 – ?? = 20.

=> 70 – 20 = ??

=> 50 = ??.

?? – 30 = 30.

=> ?? = 30 + 30

=> ?? = 60.

95 – 40 = ?? .

=> 55 = ??.

55 – ?? = 35.

=> 55 – 35 = ??

=> 20 = ??.

?? – 25 = 25.

=> ?? = 25 + 25

=> ?? = 50.

Question 3.

CHALLENGE Fill in the missing numbers.

250 = ___________ + 6

90 + 70 = ____________ + 17

140 – 60 = 30 + _______________

Answer:

Missing numbers:

250 = _____244______ + 6.

90 + 70 = ____143________ + 17.

140 – 60 = 30 + ______50_________.

Explanation:

Missing numbers in equations:

250 = ??+ 6.

=> 250 – 6 = ??

=> 244 = ??.

90 + 70 = ?? + 17.

=> 160 = ?? + 17

=> 160 – 17 = ??

=> 143 = ??.

140 – 60 = 30 + ??

=> 80 = 30 + ??

=> 80 + 30 = ??

=> 50 = ??.

**Fill in the blanks with words that make sense and seem interesting. Solve each problem. Show your work.**

Question 4.

Kendra has 57 ____________ in her top drawer.

She has 28 ____________ in her bottom drawer.

How many are there in all? ____________

Answer:

Kendra has 57 pencils in her top drawer.

She has 28 pens in her bottom drawer.

Total number of pencils and pens she has in all = 85.

Explanation:

Number of pencils Kendra has in her top drawer = 57.

Number of pens she has in her bottom drawer = 28.

Total number of pencils and pens she has in all = Number of pencils Kendra has in her top drawer + Number of pens she has in her bottom drawer

= 57 + 28

= 85.

Question 5.

Lin spent 39 dollars for a ____________.

He spent 18 dollars for a ____________.

How much did he spend in all? ____________

Answer:

Lin spent 39 dollars for a ___pizza _________.

He spent 18 dollars for a ___potato chips_________.

Total number of dollars he spent in all = 57.

Explanation:

Number of dollars Lin spent for buying a pizza = 39.

Number of dollars Lin spent for buying a potato chips = 18.

Total number of dollars he spent in all = Number of dollars Lin spent for buying a pizza + Number of dollars Lin spent for buying a potato chips

= 39 + 18

= 57.

Question 6.

Akiko had 72 ____________.

She gave 26 of them to her friend.

How many does she have left? ____________

Answer:

Number of apples she have left = 46.

Explanation:

Number of apples Akiko had = 72.

Number of apples Akiko gave to her friend = 26.

Number of apples she have left = Number of apples Akiko had – Number of apples Akiko gave to her friend

= 72 – 26

= 46.

Question 7.

Mr. Smith baked 48 ____________.

The dog ate 19 of them.

How many are left? ____________

Answer:

Number of cookies are left = 29.

Explanation:

Number of cookies Mr. Smith baked = 48.

Number of cookies the dog ate of them = 19.

Number of cookies are left = Number of cookies Mr. Smith baked – Number of cookies the dog ate of them

= 48 – 19

= 29.

Question 8.

Frank saw 51 ____________.

Then 24 of them flew away.

How many were left? ____________

Answer:

Number of piegons were left = 27.

Explanation:

Number of piegons Frank saw = 51.

Number of piegons flew away = 24.

Number of piegons were left = Number of piegons Frank saw – Number of piegons flew away

= 51 – 24

= 27.

**Bridges in Mathematics Grade 2 Home Connections Unit 7 Module 4 Session 4 Answer Key**

**Cleaning Desks & Measuring Lines**

Question 1.

Finish the graph on the right. Give it a title. Color in the columns to show what the kids found in their desks.

Answer:

Explanation:

Number of extra pencils = 44.

Number of extra scissors = 18.

Number of extra glue sticks = 12.

Number of extra erasers = 15.

Number of extra books = 9.

Question 2.

How many more pencils than erasers did the kids find? Show your work.

Answer:

29 more pencils than erasers did the kids found.

Explanation:

Number of extra pencils = 44.

Number of extra erasers = 15.

Difference:

Number of extra pencils – Number of extra erasers

= 44 – 15

= 29.

Question 3.

**CHALLENGE** How many extra things did they find in all? Show your work.

Answer:

26 extra things they found in all.

Explanation:

Number of extra pencils = 44.

Number of extra scissors = 18.

Difference:

Number of extra pencils – Number of extra scissors

= 44 – 18

= 26.

Question 1.

Here are two lines. Put an X on the one you think is shorter.

a. Measure each line. Use the centimeter side of your ruler.

Line A is _____________ centimeters long.

Line B is _____________ centimeters long.

Answer:

Line A is _____15________ centimeters long.

Line B is _____20________ centimeters long.

Explanation:

Number of centimeters Line A = 15.

Number of centimeters Line B = 20.

b. Which line is shorter? (Circle one.)

Line A

Line B

Answer:

Line A is shorter.

Explanation:

Number of centimeters Line A = 15.

Number of centimeters Line B = 20.

c. How much shorter is it? Show your work. Mark the answer clearly.

Answer:

Line A is shorter than Line B.

Explanation:

Number of centimeters Line A = 15.

Number of centimeters Line B = 20.

Difference:

Number of centimeters Line B = 20 – Bigger.

Number of centimeters Line A = 15 – Smaller.

Question 2.

Here are two crooked lines. Put an x on the one you think is longer.

a. Measure each crooked line. Use the centimeter side of your ruler.

Crooked line C is _____________ centimeters long.

Crooked line D is _____________ centimeters long.

Answer:

Crooked line C is ______21_______ centimeters long.

Crooked line D is ______25_______ centimeters long.

Explanation:

Number of centimeters Crooked line C = 2cm + 8cm + 5cm + 4cm + 2cm = 21cm.

Number of centimeters Crooked line D = 1cm + 3cm + 9cm + 10cm + 2cm = 25cm.

b. Which crooked line is longer? (Circle one.)

Crooked Line C

Crooked Line D

Answer:

Crooked Line D is longer than Crooked Line C.

Explanation:

Number of centimeters Crooked line C = 2cm + 8cm + 5cm + 4cm + 2cm = 21cm.

Number of centimeters Crooked line D = 1cm + 3cm + 9cm + 10cm + 2cm = 25cm.

c. How much longer is it? Show your work. Mark the answer clearly.

Answer:

4 cm longer is Crooked line D than Crooked line C.

Explanation:

Number of centimeters Crooked line C = 2cm + 8cm + 5cm + 4cm + 2cm = 21cm.

Number of centimeters Crooked line D = 1cm + 3cm + 9cm + 10cm + 2cm = 25cm.

Difference:

Number of centimeters Crooked line D – Number of centimeters Crooked line C

= 25 – 21

= 4cm.