# Bridges in Mathematics Grade 1 Home Connections Unit 2 Module 4 Answer Key

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## Bridges in Mathematics Grade 1 Home Connections Answer Key Unit 2 Module 4

Bridges in Mathematics Grade 1 Home Connections Unit 2 Module 4 Session 2 Answer Key

Question 1.
Trace the word and write it again 4 times.  Explanation:
Number given for tracing = 6 or Six.
Number of times to trace the number = 4.

Question 2.
Fill in the answers for each of the problems.

3 + 3 = ____ 2 + 4 = _____ 1 + 5 = ______
0 + 6 = ____ 4 + 2 = _____ 5 + 1 = _______
3 + ___ = 6 5 + ___ = 6 4 + ___ = 6
3 + 3 = 6.                    2 + 4 = 6.                            1 + 5 = 6.
0 + 6 = 6.                    4 + 2 = 6.                            5 + 1 = 6.
3 + 3= 6.                     5 + 1= 6.                              4 + 2 = 6.

Explanation:
3 + 3 = 6.
2 + 4 = 6.
1 + 5 = 6.
0 + 6 = 6.
4 + 2 = 6.
5 + 1 = 6.
3 + ?? = 6
=> ?? = 6 -3
=> ?? = 3.
5 + ?? = 6
=> ?? = 6 – 5
=> ?? = 1.
4 + ?? = 6
=> ?? = 6 – 4
=> ?? = 2.

b. Subtract.
6 – 3 = ____ 6 – 4 = _____ 6 – 0 = _____
6 – 2 = ____ 6 – 5 = _____ 6 – 1 = _____
6 – ____ = 3 6 – ____ = 1 6 – ____ = 4
6 – 3 = 3.                   6 – 4 = 2.                  6 – 0 = 6.
6 – 2 = 4.                   6 – 5 = 1.                  6 – 1 = 5.
6 – 3 = 3.                   6 – 5 = 1.                  6 – 2 = 4.

Explanation:
6 – 3 = 3.
6 – 4 = 2.
6 – 0 = 6.
6 – 2 = 4.
6 – 5 = 1.
6 – 1 = 5.
6 – ?? = 3
=> ?? = 6 – 3
=> ?? = 3.
6 – ?? = 1
=> ?? = 6 – 1
=> ?? = 5.
6 – ?? = 4
=> ?? = 6 – 4
=> ?? = 2.

Question 3.
CHALLENGE Fill in the missing numbers in the equations below.
30 + 30 = _____ 20 + 40 = _____ 50 + ___ = 60
10 + ____ = 60 30 + ____ = 60 40 + ___ = 60
20 + ____ + 20 = 60 40 + ____ + 10 = 60 40 + 0 + ___ = 60
30 + 10 + ____ = 60 10 + 20 + ____ = 60 50 + 10 + ___ = 60
Missing numbers:
30 + 30 = 60.                         20 + 40 = 60.                      50 + 10 = 60.
10 + 50 = 60.                         30 + 30 = 60.                       40 + 20 = 60.
20 + 20 + 20 = 60.              40 + 10+ 10 = 60.                40 + 0 + 20 = 60
30 + 10 + 30 = 60.              10 + 20 + 30 = 60.               50 + 10 + 0 = 60.

Explanation:
Given equations:
30 + 30 = 60.
20 + 40 = 60.
50 + 10 = 60.
10 + ?? = 60
=> ?? = 60 – 10
=> ?? = 50.
30 + ?? = 60
=> ?? = 60 – 30
=> ?? = 30.
40 + ?? = 60
=> ?? = 60 – 40
=> ?? = 20.
20 + ?? + 20 = 60
=> ?? + 40 = 60
=> ?? = 60 – 40
=> ?? = 20.
40 + ?? + 10 = 60
=> 50 + ?? = 60
=> ?? = 60 – 50
=> ?? = 10.
40 + 0 + ?? = 60
=> 40 + ?? = 60
=> ?? = 60 – 40
=> ?? = 20.
30 + 10 + ?? = 60
=> 40 + ?? = 60
=> ?? = 60 – 40
=> ?? = 20.
10 + 20 + ?? = 60
=> 30 + ?? = 60
=> ?? = 60 – 30
=> ?? = 30.
50 + 10 + ?? = 60
=> 60 + ?? = 60
=> ?? = 60 – 60
=> ?? = 0.

Question 4.
Fill in the blanks.
6 – ____ = 1 6 – ____ = 2 6 – ____ = 4
6 – ____ = 0 6 – ___ = 6 6 – ____ = 5
____ – 4 = 2 ___ – 3 = 3 6 – 1 = _____
6 – 4 = ____ 6 – 2 = ____ 6 – 5 = _____
Missing numbers:
6 – 5 = 1.                    6 – 4 = 2.                        6 – 2 = 4.
6 – 6 = 0.                    6 – 0 = 6.                        6 – 1 = 5.
6 – 4 = 2.                    6 – 3 = 3.                        6 – 1 = 5.
6 – 4 = 2.                    6 – 2 = 4.                        6 – 5 = 1.

Explanation:
Given equations:
6 – ?? = 1
=> ?? = 6 – 1
=> ?? = 5.
6 – ?? = 2
=> ?? = 6 – 2
=> ?? = 4.
6 – ?? = 4
=> ?? = 6 – 4
=> ?? = 2.
6 – ?? = 0
=> ?? = 6 – 0
=> ?? = 6.
6 – ?? = 6
=> ?? = 6 – 6
=> ?? = 0.
6 – ?? = 5
=> ?? = 6 – 5
=> ?? = 1.
??- 4 = 2
=> ?? = 4 + 2
=> ?? = 6.
?? – 3 = 3
=> ?? = 3 + 3
=> ?? = 6.
6 – 1 = 5.
6 – 4 = 2.
6 – 2 = 4.
6 – 5 = 1.

Question 5.
Solve the subtraction problems. Equations: Explanation:
Subtraction:
5 – 2 =4.         4 – 2 = 2.      1 – 1 = 0.        3 – 0 = 3.        5 – 1 = 4.          2 – 2 = 0.          3 – 2 = 1.
5 – 3 = 2.        4 – 1 = 3.      3 – 3 = 0.        3 -1 = 2.         5 – 0 = 5.          4 – 0 = 4.          2 – 1 = 1.
1 – 0 = 1.        4 – 3 = 1.      5 – 4 = 1.       2 – 0 = 2.         5 – 5 = 0.          4 – 4 = 0.          0 – 0 = 0.

Question 6.
There were 6 bugs outside the house. Some of them went inside to get warm. Now there are only 2 bugs outside the house. How many bugs went inside? Use numbers, pictures, or words to solve this problem. ____ bugs went inside the house.
Number of bugs inside the house = 4.
4 bugs went inside the house.

Explanation:
Number of bugs outside the house = 6.
Number of bugs outside the house now = 2.
Number of bugs inside the house = Number of bugs outside the house – Number of bugs outside the house now
= 6 – 2
= 4.

Bridges in Mathematics Grade 1 Home Connections Unit 2 Module 4 Session 5 Answer Key

Counting by Fives & Tens

Question 1.
For each row, count how many arms the sea stars have, and write that number in the box on the right side.  Explanation:
Given:
Number of arms in one starfish = 5.
Number of arms in two starfish = 5 + 5
= 10.
Number of arms in three starfish = 5 + 5 + 5
= 10 + 5 = 15.
Number of arms in four starfish = 5 + 5 + 5 + 5
= 10 + 5 + 5
= 10 + 10
= 20.
Number of arms in five starfish = 5 + 5 + 5 + 5 + 5
= 10 + 5 + 5 + 5
= 15 + 5 + 5
= 20 + 5
= 25.

Question 2.
Continue the counting by 5s pattern.  Explanation:
Counting by 5s pattern:
0   0
0  5
1  1
1  5
2  0
2   5
3   0
3   5
4   0
4   5
5   0
5   5
6   0
6   5

Question 3.
Max saw 7 sea stars. How many arms? Use numbers, pictures, or words to solve the problem. Max saw ___ sea star arms.
Total number of arms all sea fishes have = 35.
Max saw 35 sea star arms.

Explanation:
Number of sea stars Max saw = 7.
Number of arms each sea star has = 5.
Total number of arms all sea fishes have = Number of sea stars Max saw × Number of arms each sea star has
= 7 × 5
= 35.

Question 4.
Count the cubes in each box. Write the number on the line.

a.  Explanation:
Number of cubes in each box = ??
=> 5 or Five.

b.  Explanation:
Number of cubes in each box = ??
=> (1 × 10) + (5 × 1)
=> 10 + 5
=> 15 or Fifteen.

c.  Explanation:
Number of cubes in each box = ??
=> (3 × 10) + (5 × 1)
=>30 + 5
= > 35 or Thirty Five.

d.  Explanation:
Number of cubes in each box = ??
=> (4 × 10) + (5 × 1)
=> 40 or Forty.

e.  Explanation:
Number of cubes in each box = ??
=> (2 × 10) + (5 × 1)
=> 20 + 5
=> 25 or Twenty five.

f.  Explanation:
Number of cubes in each box = ??
=> (2 × 10)
=> 20 or Twenty.

g.  Explanation:
Number of cubes in each box = ??
=> (3 × 10)
=> 30 or Thirty.

h.  Explanation:
Number of cubes in each box = ??
=> (1 × 10)
=> 10 or Ten.

Question 5.
Fill in the missing numbers on the number line. You can use the cubes above to help you count.  Explanation:
Missing numbers pattern:
5 is the difference from each number.
=> Missing numbers:
0 + 5 = 5.
5 + 5 = 10.
10 + 5 = 15.
15 + 5 = 20.
20 + 5 = 25.
25 + 5 = 30.
30 + 5 = 35.
35 + 5 = 40.

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