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Bridges in Mathematics Grade 1 Home Connections Answer Key Unit 2 Module 3
Bridges in Mathematics Grade 1 Home Connections Unit 2 Module 3 Session 2 Answer Key
Dots, Apples & Shapes
Question 1.
Draw the dots on the right side of each card to make 10. Then write a fact family to match.
ex
a.
Answer:
Explanation:
Number of given dots = 7.
Total number of dots to make = 10
Number of more dots needed = Total number of dots to make – Number of given dots
= 10 – 7
= 3.
Equations:
3 + 7 = 10.
7 + 3 = 10.
10 – 7 = 3.
10 – 3 = 7.
b.
Answer:
Explanation:
Number of given dots = 1.
Total number of dots to make = 10
Number of more dots needed = Total number of dots to make – Number of given dots
= 10 – 1
= 9.
Equations:
1 + 9 = 10.
9 + 1 = 10.
10 – 1 = 9.
10 – 9 = 1.
c.
Answer:
Explanation:
Number of given dots = 8.
Total number of dots to make = 10
Number of more dots needed = Total number of dots to make – Number of given dots
= 10 – 8
= 2.
8 + 2 = 10.
2 + 8 = 10.
10 – 2 = 8.
10 – 8 = 2.
d.
Answer:
Explanation:
Number of given dots = 10.
Total number of dots to make = 10
Number of more dots needed = Total number of dots to make – Number of given dots
= 10 – 10
= 0.
10 + 0 = 10.
0 + 10 = 10.
10 – 0 = 10.
Question 2.
Fill in the missing numbers.
9 + 
= 10Â Â Â Â Â Â + 1 = 10Â Â Â Â Â Â 4 + 6 = Â Â Â Â Â Â Â Â Â Â Â Â Â Â 10 + = 10
10 – 6 = Â Â Â Â Â Â Â 10 – 7 = Â Â Â Â Â Â 10 – 1 = Â Â Â Â Â Â Â Â Â Â Â Â Â Â 10 – 8 =
10 – = 6Â Â Â Â Â Â Â – 1 = 9Â Â Â Â Â Â Â 10 – 4 = Â Â Â Â Â Â Â Â Â Â Â Â Â 10 – = 8
Answer:
Explanation:
Missing numbers:
9 + ?? = 10.
=> ?? = 10 – 9
=> ?? = 1.
?? + 1 = 10.
=> ?? = 10 – 1
=> ?? = 9.
4 + 6 = 10.
10 + ?? = 10.
=> ?? = 10 – 10
=> ?? = 0.
10 – 6 = 4.
10 – 7 = 3.
10 – 1 = 9.
10 – 8 = 2.
10 – ?? = 6.
=> ?? = 10 – 6
=> ?? = 4.
?? – 1 = 9.
=> ?? = 9 + 1
=> ?? = 10.
10 – 4 = 6.
10 – ?? = 8.
=> ?? = 10 = 8
=> ?? = 2.
Question 3.
There were 3 apples on the table. Jan put 6 more apples on the table. How many apples were on the table in all? Show your work.
There were ______ apples on the table in all.
Answer:
Number of apples all on the table = 9.
There were 9 apples on the table in all.
Explanation:
Number of apples on the table = 3.
Number of more apples Jan puts on the table = 6.
Number of apples all on the table = Number of apples on the table + Number of more apples Jan puts on the table
= 3 + 6
= 9.
Question 4.
CHALLENGE Make a picture that is worth 14⊄. You can use as many as you like of these shapes. Label your picture. Prove that it is worth 14⊄.
Answer:
Explanation:
Total amount a picture that is worth = 14⊄.
Value of a square = 5⊄.
Value of a circle = 2⊄.
Value of a triangle = 1⊄.
Equations of value 14⊄ by shapes:
14 = 5 + 5 + 2 + 2
14 = 5 + 5 + 1 + 1 + 2
14 = 5 + 2 + 2 + 2 + 2 + 1
14 = 5 + 2 + 2 + 2 + 1 + 1 + 1
Bridges in Mathematics Grade 1 Home Connections Unit 2 Module 3 Session 5 Answer Key
Dots & Dollars
Question 1.
Draw the dots on the right side of each card to make 9. Then write a fact family to match.
ex
a.
Answer:
Explanation:
Number of given dots = 5.
Total number of dots to make = 10
Number of more dots needed = Total number of dots to make – Number of given dots
= 10 – 5
= 5.
=> Equations:
5 + 5 = 10.
10 – 5 = 5.
b.
Answer:
Explanation:
Number of given dots = 3.
Total number of dots to make = 10
Number of more dots needed = Total number of dots to make – Number of given dots
= 10 – 3
= 7.
=> Equations:
3 + 7 = 10.
7 + 3 = 10.
10 – 7 = 3.
10 – 3 = 7.
c.
Answer:
Explanation:
Number of given dots = 8.
Total number of dots to make = 10
Number of more dots needed = Total number of dots to make – Number of given dots
= 10 – 8
= 2.
=> Equations:
8 + 2 = 10.
2 + 8 = 10.
10 – 2 = 8.
10 – 8 = 2.
d.
Answer:
Explanation:
Number of given dots = 4.
Total number of dots to make = 10
Number of more dots needed = Total number of dots to make – Number of given dots
= 10 – 4
= 6.
=> Equations:
4 + 6 = 10.
6 + 4 = 10.
10 – 6 = 4.
10 – 4 = 6.
Question 2.
Fill in the missing numbers
9 + 
= 9Â Â Â + 7 = 9Â Â Â Â Â 6 + 3 = Â Â Â Â 9 + = 10
9 – 3 = Â Â Â 9 – 6 = Â Â Â Â Â Â Â 9 – 4 = Â Â Â Â 9 – 5 =
9 – = 0Â Â Â – 2 = 7Â Â Â Â Â Â Â Â 9 – 8 = Â Â Â Â 9 – = 5
Answer:
Explanation:
9 + ?? = 9.
=> ?? = 9 – 9
=> ?? = 0.
?? + 7 = 9.
=> ?? = 9 – 7
=> ?? = 2.
6 + 3 = 9.
9 + ?? = 10.
=> ?? = 10 – 9
=> ?? = 1.
9 – 3 = 6.
9 – 6 = 3.
9 – 4 = 5.
9 – 5 = 4.
9 – ?? = 0.
?? = 9 – 0
=> ?? = 9.
?? – 2 = 7.
=> ?? = 7Â 2
=> ?? = 5.
9 – 8 = 1.
9 – ?? = 5.
=> ?? = 9 – 5
=> ?? = 4.
Question 3.
Marco has 6 dollars. How many more dollars does he need to have 10 dollars in all? Show your work.
Marco needs ____ dollars to have 10 dollars in all.
Answer:
Number of dollars he needs to have 10 dollars = 4.
Marco needs 4 dollars to have 10 dollars in all.
Explanation:
Number of dollars Marco has = 6.
Total number of dollars = 10.
Number of dollars he needs to have 10 dollars = Total number of dollars – Number of dollars Marco has
= 10 – 6
= 4.
Question 4.
CHALLENGE Katy and her two friends have 5 dollars each. They want to buy a game that costs 18 dollars. How much more money do they need? Show your work.
Katy and her friends need ____ more dollars to have 18 dollars in all.
Answer:
Number of dollars they need more to buy game =3.
Katy and her friends need 3 more dollars to have 18 dollars in all.
Explanation:
Number of people = 3.
Number of dollars each have = 5.
Cost of the game they want to buy = 18 dollars.
Total number of dollars they have = Number of people × Number of dollars each have
= 3 × 5
= 15.
Number of dollars they need more to buy game = Cost of the game they want to buy – Total number of dollars they have
= 18 – 15
= 3.