# 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 Sam’s domino looks.  Explanation:
Number of dots Sam has a domino = 4.

Question 4.
Maria’s domino has 1 less dot than Tim’s. Draw the dots on Tim’s domino to show how it looks. How many dots? ______ How many dots? ______
Number of dominos Tim’s has = 6. Explanation:
Number of dominos Maria’s has = 7.
Maria’s domino has 1 less dot than Tim’s.
=> Number of dominos Tim’s has = Number of dominos Maria’s has – 1
=> 7 – 1
=> 6.

Question 5.
Jeff’s domino has 6 dots. Draw dots on the dominoes below to show three different dominoes that Jeff might have.  Explanation:
Number of dots Jeff’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. Kim’s domino has 2 more dots than Tom’s. Draw dots on these two dominoes to show how Tom’s and Kim’s dominoes look. How many dots? ________ How many dots? ________  