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

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

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

More Domino Magic Squares

How many dots?
Add the dots on the dominoes going down each column and then going across each row. Then add the sums both ways, vertically and horizontally. Do you get the same total both times? Is it magic, or is there a mathematical explanation?
ex

Question 1.

Explanation:
Given dots:
2 + 5 = 7.
3 + 4 = 7.
=> 7 + 7 = 14.
2 + 3 = 5.
5 + 4 = 9.
=> 5 + 9 = 14.

Question 2.

Explanation:
Given dots:
0 + 5 = 5.
3 + 3 = 6.
=> 5 + 6 = 11.
0 + 3 = 3.
5 + 3 = 8.
=> 3 + 8 = 11.

Question 3.

Explanation:
Given dots:
4 + 4 = 8.
2 + 0 = 2.
=> 8 + 2 = 10.
4 + 2 = 6.
4 + 0 = 4.
=> 6 + 4 = 10.

Question 4.

Explanation:
Given dots:
3 + 5 = 8.
2 + 3 = 5.
=> 8 + 5 = 13.
3 + 2 = 5.
5 + 3 = 8.
=> 5 + 8 = 13.

Question 5.

Explanation:
Given dots:
2 + 6 = 8.
6 + 2 = 8.
=> 8 + 8 = 16.
2 + 6 = 8.
6 + 2 = 8.
=> 8 + 8 = 16.

Question 6.

Explanation:
Given dots:
5 + 1 = 6.
2 + 4 = 6.
=> 6 + 6 = 12.
5 + 2 = 7.
1 + 4 = 5.
=> 7 + 5 = 12.

Challenge Problems

Question 7.

Explanation:
Given dots:
5 + 2 = 7.
1 + 3 = 4.
3 + 4 + 2 = 7 + 2 = 9.
=> 7 + 4 + 9 = 11 + 9 = 20.
5 + 1 + 3 = 6 + 3 = 9.
0 + 4 = 4.
2 + 3 + 2 = 5 + 2 = 7.
=> 9 + 4 + 7 = 13 + 7 = 20.

Question 8.

Explanation:
Given dots:
2 + 2 + 2 = 4 + 2 = 6.
3 + 4 = 7.
4 + 5 + 1 = 9 + 1 = 10.
=> 6 + 7 + 10 = 13 + 10 = 23.
2 + 3 + 4 = 5 + 4 = 9.
2 + 7 = 9.
2 + 4 + 1 = 6 + 1 = 7.
=> 9 + 9 + 7 = 18 + 7 = 23.

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

Question 1.
Trace each number.

Explanation:
Number given for tracing:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10.

Question 2.
Fill in the missing numbers.

Explanation:
Missing number pattern:
1 more than each number.
=> 1, 2, 3, 4, 5, 6, 7, 8, 9, 10.
11, 12, 13, 14, 15, 16, 17, 18, 19, 20.
21, 22, 23, 24, 25, 26, 27, 28, 29, 30.
31, 32, 33, 34, 35, 36, 37, 38, 39, 40.

Numbers & Domino Dots

Solve the problems about dominoes below.

Question 3.
Sam has a domino with 4 dots on it. Draw the dots on this domino to show how Samâ€™s domino looks.

Explanation:
Number of dots Sam has a domino = 4.

Question 4.
Mariaâ€™s domino has 1 less dot than Timâ€™s. Draw the dots on Timâ€™s domino to show how it looks.

How many dots? ______

How many dots? ______
Number of dominos Timâ€™s has = 6.

Explanation:
Number of dominos Mariaâ€™s has = 7.
Mariaâ€™s domino has 1 less dot than Timâ€™s.
=> Number of dominos Timâ€™s has = Number of dominos Mariaâ€™s has – 1
=> 7 – 1
=> 6.

Question 5.
Jeffâ€™s domino has 6 dots. Draw dots on the dominoes below to show three different dominoes that Jeff might have.

Explanation:
Number of dots Jeffâ€™s domino has = 6.
Three different dominoes that Jeff might have:
1 + 5 = 6.
2 + 4 = 6.
3 + 3 = 6.

Question 6.
CHALLENGE Tom has a domino with some dots. Kimâ€™s domino has 2 more dots than Tomâ€™s. Draw dots on these two dominoes to show how Tomâ€™s and Kimâ€™s dominoes look.

How many dots? ________

How many dots? ________