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Bridges in Mathematics Grade 1 Home Connections Answer Key Unit 3 Module 2
Bridges in Mathematics Grade 1 Home Connections Unit 3 Module 2 Session 2 Answer Key
Sixes, Crayons & Coins
Question 1.
Write an equation to match each cube train.
ex
3 + 3 = 6
a.
Answer:
Equation:
2 + 2 + 2 = 6.
Explanation:
Number of cubes shaded = 2.
Matching the cube train:
=> 2 + 2 + 2 = 6.
b.
Answer:
Equation:
1 + 1 + 1 + 1 + 1 + 1 = 6.
Explanation:
Number of cubes shaded = 1.
Matching the cube train:
1 + 1 + 1 + 1 + 1 + 1
= 6.
c.
Answer:
Equation:
2 + 2 + 1 + 1 = 6.
Explanation:
Number of cubes shaded = 2 + 2 = 4..
Matching the cube train:
2 + 2 + 1 + 1
= 4 + 1 + 1
= 6.
Question 2.
Color in the train to match each equation.
ex 4 + 2 = 6
a.
3 + 2 + 1 = 6
Answer:
Explanation:
Equation: 3 + 2 + 1 = 6.
Matching the cube train.
b. 1 + 5 = 6
Answer:
Explanation:
Equation: 1 + 5 = 6.
Matching the cube train.
c. 1 + 4 + 1 = 6
Answer:
Explanation:
Equation: 1 + 4 + 1 = 6.
Matching the cube train.
Question 3.
Subtract.
6 – 0 = ____ 5 – 2 = _____ 5 – 5 = _____ 6 – 2 = ____
6 – 4 = ____ 6 – 1 = _____ 6 – 3 = _____ 5 – 4 = ____
6 – 5 = ____ 5 – 3 = _____ 6 – 6 = _____ 5 – 1 = ____
Answer:
6 – 0 = 6.         5 – 2 = 3.         5 – 5 = 0.        6 – 2 = 4.
6 – 4 = 2.        6 – 1 = 5.       6 – 3 = 3.        5 – 4 = 1.
6 – 5 = 1.        5 – 3 = 2.       6 – 6 = 0.       5 – 1 = 4.
Explanation:
Subtraction:
6 – 0 = 6.
5 – 2 = 3.
5 – 5 = 0.
6 – 2 = 4.
6 – 4 = 2.
6 – 1 = 5.
6 – 3 = 3.
5 – 4 = 1.
6 – 5 = 1.
5 – 3 = 2.
6 – 6 = 0.
5 – 1 = 4.
Question 4.
Fill in the missing number.
2 + _____ = 6 _____ + 5 = 6 6 = 3 + _____ 6 = 4 + _____
3 + _____ = 6 _____ + 0 = 6 6 = 2 + _____ 6 = 6 + _____
Answer:
Equations:
2 + 4 = 6.      1 + 5 = 6.        6 = 3 + 3.      6 = 4 + 2.
3 + 3 = 6.       6 + 0 = 6.        6 = 2 + 4.      6 = 6 + 0.
Explanation:
Missing number:
2 + ?? = 6
=> ?? = 6 – 2
=> ?? = 4.
?? + 5 = 6
=> ?? = 6 – 5
=> ?? = 1.
6 = 3 + ??
=> 6 – 3 = ??
=> 3 = ??
6 = 4 + ??
=> 6 – 4 = ??
=> 2 = ??
3 + ?? = 6
=> ?? = 6 – 3
=> ?? = 3.
?? + 0 = 6
=> ?? = 6 – 0
=> ?? = 6.
6 = 2 + ??
=> 6 – 2 = ??
=> 4 = ??
6 = 6 + ??
=> 6 – 6 = ??
=> 0 = ??
Question 5.
John had some crayons. He gave 5 to Jen. Now he has 7 crayons left. How many crayons did John have to start with? Show your work.
John started out with ___ crayons.
Answer:
Number of crayons he started with = 12.
John started out with 12 crayons.
Explanation:
Number of crayons John gave to Jen = 5.
Number of crayons he has left now = 7.
Number of crayons he started with =Â Number of crayons John gave to Jen + Number of crayons he has left now
= 5 + 7
= 12.
Question 6.
CHALLENGE Here are three clues:
- Kendra has 5 coins.
- She has 354.
- She has only nickels and dimes.
How many nickels does Kendra have? How many dimes does Kendra have? Show your work.
Kendra has ____ nickels. Kendra has ____ dimes.
Answer:
Number of nickels and dimes she has each = 177.
Kendra has 177 nickels.
Kendra has 177dimes.
Explanation:
Number of coins Kendra has = 5.
Amount of money She has = 354.
She has only nickels and dimes.
=> Number of nickels and dimes she has each = Amount of money She has ÷ 2
= 354 ÷ 2
= 177.
Bridges in Mathematics Grade 1 Home Connections Unit 3 Module 2 Session 5 Answer Key
Ten & Twenty
How many more to make 10?
Question 1.
How many more beads do you need to make 10 in all? Write the number in the box at the right of each bead string.
ex
a.
Answer:
Explanation:
Number of beads given = 5.
Total number of beads = 10.
Number of beads needed more = Total number of beads – Number of beads given
= 10 – 5
= 5.
b.
Answer:
Explanation:
Number of beads given = 9.
Total number of beads = 10.
Number of beads needed more = Total number of beads – Number of beads given
= 10 – 9
= 1.
c.
Answer:
Explanation:
Number of beads given = 6.
Total number of beads = 10.
Number of beads needed more = Total number of beads – Number of beads given
= 10 – 6
= 4.
d.
Answer:
Explanation:
Number of beads given = 2.
Total number of beads = 10.
Number of beads needed more = Total number of beads – Number of beads given
= 10 – 2
= 8.
e.
Answer:
Explanation:
Number of beads given = 7.
Total number of beads = 10.
Number of beads needed more = Total number of beads – Number of beads given
= 10 – 7
= 3.
Question 2.
Fill in the box to complete each equation.
6 + 
= 10 4 + = 10 7 + = 10 3 + = 10
10 = 8 + 10 = 2 + 10 = 5 + 10 = 9 +
Answer:
Explanation:
Equations:
6 + ?? = 10.
=>?? = 10 – 6
=> ?? = 4.
4 + ?? = 10.
=> ?? = 10 – 4
=> ?? = 6.
7 + ?? = 10.
=> ?? = 10 – 7
=> ?? = 3.
3 + ?? = 10.
=> ?? = 10 – 3
=> ?? = 7.
10 = 8 + ??
=> 10 – 8 = ??
=> 2 = ??
10 = 2 + ??
=> 10 – 2 = ??
=> 8 = ??
10 = 5 + ??
=> 10 – 5 = ??
=> 5 = ??
10 = 9 + ??
=> 10 – 9 = ??
=> 1 = ??
Question 3.
Are these equations correct? Circle yes or no to show.
Answer:
Explanation:
Equations:
5 + 4 = 9 not 10. – NO
10 = 1 + 9. – YES
2 + 3 + 5 = 5 + 5 = 10 . YES
5 + 5 = 10. – YES
7 + 2 = 9 not 10. – NO
1 + 2 + 3 + 4 = 3 + 3 + 4 = 6 + 4 = 10. – YES
Question 4.
How many more beads do you need to make 20 in all? Write the number in the box at the right of each pair of bead strings.
a.
Answer:
Explanation:
Number of beads given = 10 + 5 = 15.
Total number of beads = 20.
Number of beads needed more = Total number of beads – Number of beads given
= 20 – 15
= 5.
b.
Answer:
Explanation:
Number of beads given = 10 + 8 = 18.
Total number of beads = 20.
Number of beads needed more = Total number of beads – Number of beads given
= 20 – 18
= 2.
c.
Answer:
Explanation:
Number of beads given = 5 + 5 = 10.
Total number of beads = 20.
Number of beads needed more = Total number of beads – Number of beads given
= 20 – 10
= 10.
d.
Answer:
Explanation:
Number of beads given = 10 + 2 = 12.
Total number of beads = 20.
Number of beads needed more = Total number of beads – Number of beads given
= 20 – 12
= 8.
Question 5.
Dan had 10 mini racer cars. He got 6 more mini racer cars for his birthday. Then his brother gave him 4 more mini racer cars.
a. How many mini racer cars does Dan have in all? Show your work.
Answer:
Total number of mini racer cars he has now = 20.
Explanation:
Numbers of mini racer cars Dan had = 10.
Numbers of mini racer cars Dan got more for his birthday = 6.
Numbers of mini racer cars more his brother gave him = 4.
Total number of mini racer cars he has now = Numbers of mini racer cars Dan had + Numbers of mini racer cars Dan got more for his birthday + Numbers of mini racer cars more his brother gave him
= 10 + 6 + 4
= 16 + 4
= 20.
b. Dan has ____ mini racer cars in all.
Answer:
Total number of mini racer cars he has in all =20.
Dan has 20 mini racer cars in all.
Explanation:
Numbers of mini racer cars Dan had = 10.
Numbers of mini racer cars Dan got more for his birthday = 6.
Numbers of mini racer cars more his brother gave him = 4.
Total number of mini racer cars he has in all = Numbers of mini racer cars Dan had + Numbers of mini racer cars Dan got more for his birthday + Numbers of mini racer cars more his brother gave him
= 10 + 6 + 4
= 16 + 4
= 20.