Practicing the Bridges in Mathematics Grade 2 Home Connection Answer Key Unit 3 Module 3 will help students analyze their knowledge of concepts.
Bridges in Mathematics Grade 2 Home Connections Answer Key Unit 3 Module 3
Bridges in Mathematics Grade 2 Home Connections Unit 3 Module 3 Session 2 Answer Key
Tens & Ones, Nuts & Carrots
Question 1.
Tell how many tens and ones there are in each set of base ten pieces. Then write an equation to show the total.
ex
a.
Answer:
Explanation:
Number of Tens = 4 = 4 × 10 = 40.
Number of ones = 7 = 7 × 1 = 7.
Total = Number of Tens + Number of ones
= 40 + 7
= 47.
b.
Answer:
Explanation:
Number of Tens = 7 = 7 × 10 = 70.
Number of ones = 1 = 1 × 1 = 1.
Total = Number of Tens + Number of ones
= 70 + 1
= 71.
c.
Answer:
Explanation:
Number of Tens = 7 = 7 × 10 = 70.
Number of ones = 0.
Total = Number of Tens + Number of ones
= 70 + 0
= 70.
d.
Answer:
Explanation:
Number of Tens = 5 = 5 × 10 = 50.
Number of ones = 2 = 2 × 1 = 2.
Total = Number of Tens + Number of ones
= 50 + 2
= 52.
Question 2.
Tell how many dimes and pennies there are in each box. Then write an equation to show the total.
ex
a.
Answer:
Explanation:
Value of number of dimes = 3 = 3 × 10¢ = 30¢.
Value of number of pennies = 2 × 1 = 2¢.
Total amount = Value of number of dimes + Value of number of pennies
= 30¢ + 2¢
= 32¢.
b.
Answer:
Explanation:
Value of number of dimes = 5 = 5 × 10¢ = 50¢.
Value of number of pennies = 1 × 1 = 1¢.
Total amount = Value of number of dimes + Value of number of pennies
= 50¢ + 1¢
= 51¢.
c.
Answer:
Explanation:
Value of number of dimes = 7 = 7 × 10¢ = 70¢.
Value of number of pennies = 5 = 5 × 1 = 5¢.
Total amount = Value of number of dimes + Value of number of pennies
= 70¢ + 5¢
= 75¢.
d.
Answer:
Explanation:
Value of number of dimes = 1 = 1 × 10¢ = 10¢.
Value of number of pennies = 5 = 5 × 1 = 5¢.
Total amount = Value of number of dimes + Value of number of pennies
= 10¢ + 5¢
= 15¢.
Question 3.
The squirrels are hiding nuts for the winter. Three of the squirrels each got 4 nuts. Five of the squirrels each got 5 nuts. How many nuts do they have in all? Show your work.
The squirrels got _____ nuts in all.
Answer:
Total number of nuts they got in all = 37.
The squirrels got __37___ nuts in all.
Explanation:
Number of squirrels got 4 nuts = 3.
Number of nuts each squirrel got = 4.
Number of squirrels got 5 nuts = 5.
Number of nuts each squirrel got = 5.
Total number of nuts they got in all = (Number of squirrels got 4 nuts × Number of nuts each squirrel got) + (Number of squirrels got 5 nuts × Number of nuts each squirrel got)
= (3 × 4) + (5 × 5)
= 12 + 25
= 37.
Question 4.
CHALLENGE The zookeeper brought 9 bunches of carrots for the elephants. Each bunch had 5 carrots. He gave one of the elephants 24 carrots. How many carrots were left for the other elephants? Show your work.
There were ___ carrots left for the other elephants.
Answer:
Number of carrots were left for the other elephants = 21.
There were _21__ carrots left for the other elephants.
Explanation:
Number of bunches of carrots for the elephants the zookeeper brought = 9.
Number of carrots each bunch = 5.
Number of carrots one of the elephants he gave = 24.
Number of carrots were left for the other elephants = (Number of bunches of carrots for the elephants the zookeeper brought × Number of carrots each bunch) – Number of carrots one of the elephants he gave
= (9 × 5) – 24
= 45 – 24
= 21.
Bridges in Mathematics Grade 2 Home Connections Unit 3 Module 3 Session 3 Answer Key
Shopping & Adding
Question 1.
Erika went to the store. She got a pencil for 15⊄ and a tablet for 25⊄. She gave the storekeeper 50⊄. How much money did she get back? Show your work.
Erika got ____ back.
Answer:
Amount of money she gets back = 10⊄.
Erika got __10⊄__ back.
Explanation:
Cost of a pencil she got = 15⊄.
Cost of a tablet she got = 25⊄.
Amount of money she gave to shopkeeper = 50⊄.
Amount of money she gets back = Amount of money she gave to shopkeeper – (Cost of a pencil she got + Cost of a tablet she got)
= 50⊄ -(15⊄ + 25⊄)
= 50⊄ – 40⊄
= 10⊄.
Question 2.
CHALLENGE Use the numbers in the box to solve the problems below.
a. Find 2 numbers whose sum is 40. ____ ____
Answer:
2 numbers whose sum is 40 are 32 and 8.
Explanation:
2 numbers whose sum is 40 = ??
=> 32 + 8 = 40.
b. Find 2 numbers whose sum is 18. ____ ____
Answer:
2 numbers whose sum is 18 are 10 and 8.
Explanation:
2 numbers whose sum is 18 = ??
=> 10 + 8 = 18.
c. Find 2 other numbers whose sum is 18. ____ _____
Answer:
2 numbers whose sum is 18 are 15 and 3.
Explanation:
2 numbers whose sum is 18 = ??
=> 15 + 3 = 18.
d. Find 2 numbers whose difference is 12. ____ _____
Answer:
2 numbers whose difference is 12 are 32 and 20.
Explanation:
2 numbers whose difference is 12 = ??
=> 32 – 20 = 12.
e. Find 3 numbers that have the largest total. ____ _____
Answer:
3 numbers that have the largest total are 32, 24 and 20.
Explanation:
3 numbers that have the largest total = ???
=> 32, 24 and 20.
f. What is the total of those 3 numbers? Show your work.
Answer:
The total of those 3 numbers 32, 24, 20 is 76.
Explanation:
Total of those 3 numbers = ???
=> 32 + 24 + 20
=> 56 + 20
=> 76.
Question 3.
Add. Use the pictures of base ten pieces to help. The second set of pieces for each problem is hidden, so you will have to draw them or imagine them.
a.
Answer:
Explanation:
Given:
Ten pieces set = 28.
Hidden pieces set = 10.
Addition:
Total = Given ten pieces set + Hidden pieces set
= 28 + 10
= 38.
b.
Answer:
Explanation:
Given:
Ten pieces set = 26.
Hidden pieces set = 16.
Addition:
Total = Given ten pieces set + Hidden pieces set
= 26 + 16
= 42.
c.
Answer:
Explanation:
Given:
Ten pieces set = 34.
Hidden pieces set = 17.
Addition:
Total = Given ten pieces set + Hidden pieces set
= 34 + 17
= 51.
d.
Answer:
Explanation:
Given:
Ten pieces set = 25.
Hidden pieces set = 26.
Addition:
Total = Given ten pieces set + Hidden pieces set
= 25 + 26
= 51.
e.
Answer:
Explanation:
Given:
Ten pieces set = 16.
Hidden pieces set = 23.
Addition:
Total = Given ten pieces set + Hidden pieces set
= 16 + 23
= 39.
f.
Answer:
Explanation:
Given:
Ten pieces set = 39.
Hidden pieces set = 14.
Addition:
Total = Given ten pieces set + Hidden pieces set
= 39 + 14
= 53.
g.
Answer:
Explanation:
Given:
Ten pieces set = 23.
Hidden pieces set = 18.
Addition:
Total = Given ten pieces set + Hidden pieces set
= 23 + 18
= 41.
h.
Answer:
Explanation:
Given:
Ten pieces set = 27.
Hidden pieces set = 27.
Addition:
Total = Given ten pieces set + Hidden pieces set
= 27 + 27
= 54.
i.
Answer:
Explanation:
Given:
Ten pieces set = 24.
Hidden pieces set = 15.
Addition:
Total = Given ten pieces set + Hidden pieces set
= 24 + 15
= 39.
j.
Answer:
Explanation:
Given:
Ten pieces set = 16.
Hidden pieces set = 16.
Addition:
Total = Given ten pieces set + Hidden pieces set
= 16 + 16
= 32.
Bridges in Mathematics Grade 2 Home Connections Unit 3 Module 3 Session 5 Answer Key
Solving Presents & Parcels Story Problems
Note to Families
Your student has spent the last several days at school working to create and solve story problems about presents and groups of 10 presents called parcels. As students work on this Home Connection, ask them to show you how working in groups of 10 rather than counting by 1s can make their work faster. You may even choose to work alongside your student and share some of your strategies to arrive at the same answer.
Solving Presents & Parcels Story Problems
Read the presents and parcels story problems on this sheet and the next, and choose at least four you want to solve. Then go to work. Remember—the answer is not enough. You need to show how you solved each problem, using pictures, numbers, and/or words. Be sure to work in 10s instead of 1s whenever you can.
ex Emile is having a birthday party. There are 35 presents for Emile at the party. Some of the presents are in the closet, and 19 of the presents are on the table. How many presents are in the closet?
Question 1.
It was June 29, Vincent’s birthday. There were 12 presents on the fireplace and 23 on the table. How many presents in all?
Answer:
Number of presents she gets in all = 35.
Explanation:
Given:
Vincent’s birthday = June 29.
Number of presents there were on the fireplace = 12.
Number of presents there were on the table = 23.
Number of presents she gets in all = Number of presents there were on the fireplace + Number of presents there were on the table
= 12 + 23
= 35.
Question 2.
It was Jake and Sam’s birthday. There were 26 presents. Jake and Sam wanted to split them evenly, but they didn’t know how. Can you help them?
Answer:
Number of presents each gets = 13.
Explanation:
Given:
It was Jake and Sam’s birthday.
Number of presents there were = 26.
Jake and Sam wanted to split them evenly.
Number of presents each gets = Number of presents there were ÷ 2
= 26 ÷ 2
= 13.
Question 3.
It was April 24, my sister’s birthday. Six kids came to her party. She had it at Zippy’s Pizza. Each kid brought 10 presents. My mom gave her 2 presents. How many presents did she get in all?
Answer:
Number of presents she gets in all = 62.
Explanation:
Given:
My sister’s birthday = April 24.
Number of kids came to birthday party = 6.
Number of presents each kid gets = 10.
Number of presents my mom gave her = 2.
Number of presents she gets in all = (Number of kids came to birthday party × Number of presents each kid gets) + Number of presents my mom gave her
= (6 × 10) + 2
= 60 + 2
= 62.
Question 4.
Today is Briana’s 18th birthday. She knows there are 18 presents in the closet and also 23 presents under the table. Now Briana wants to know how many in all.
Answer:
Number of presents are there she knows in all = 41.
Explanation:
Given:
Today is Briana’s 18th birthday.
Number of presents are there she knows in the closet = 18.
Number of presents are there she knows under the table = 23.
Number of presents are there she knows in all = Number of presents are there she knows in the closet + Number of presents are there she knows under the table
= 18 + 23
= 41.
Question 5.
Dan was having a Valentine’s party. There were 24 presents in the closet and 23 on the table. Then someone opened 12 of the presents. How many were not yet opened?
Answer:
Number of presents were not yet opened = 35.
Explanation:
Given:
Dan was having a Valentine’s party.
Number of presents in the closet there were = 24.
Number of presents on the table there were = 23.
Number of presents someone opened = 12.
Number of presents were not yet opened = (Number of presents in the closet there were + Number of presents on the table there were) – Number of presents someone opened
= (24 + 23) – 12
= 47 – 12
= 35.
Question 6.
It was Jessie’s big party. Jessie said to come at 5:00 PM. One of his friends peeked through the window. He saw only 13 presents. Jessie said there were supposed to be 42 presents. How many presents were in the closet?
Answer:
Number of presents were in the closet = 29.
Explanation:
It was Jessie’s big party.
Time Jessie said to come = 5:00 PM.
Number of presents his friends peeked through the window saw = 13.
Number of presents Jessie said there were = 42.
Number of presents were in the closet = Number of presents Jessie said there were – Number of presents his friends peeked through the window saw
= 42 – 13
= 29.
Question 7.
CHALLENGE It was Taylor’s 8th birthday and there were 47 presents. Each kid brought 10 presents, except for 3 kids who brought 5 presents each and 2 kids who brought 1 present each. How many kids came to Taylor’s party?
Answer:
Number of kids came to Taylor’s party = 8.
Explanation:
Given:
It was Taylor’s 8th birthday.
Number of presents there were = 47.
Number of presents each kid brought = 10.
Number of presents except for 3 kids brought = 5.
Number of presents except for 2 kids brought = 1.
Number of presents there were = [(?? × 10) + (3 × 5) + (2 × 1)]
=> 47  = [(?? × 10) + 15 + 2]
=> 47 = [(?? × 10) + 17
=> 47 – 17 = (?? × 10)
=> 30 = ?? × 10
=> 30 ÷ 10 = ??
=> 3 = ??.
=> Number of kids came to Taylor’s party = 3 + 3 + 2
= 8.
Bridges in Mathematics Grade 2 Home Connections Unit 3 Module 3 Session 7 Answer Key
Shopping & Subtracting
Question 1.
Alex went to the store. She bought an orange for 254, an apple for 244, and a banana for 234. How much money did she spend in all? Show your work.
Alex spent ____ in all.
Answer:
Amount of money did she spend in all = 732.
Alex spent _732___ in all.
Explanation:
Cost of an orange = 254.
Cost of an apple = 244.
Cost of a banana = 234.
Amount of money did she spend in all = Cost of an orange + Cost of an apple + Cost of a banana
= 254 + 244 + 234
= 498 + 234
= 732.
Question 2.
CHALLENGE Jake has 3 quarters and 4 nickels. An apple costs 204. How many apples can Jake buy? Show your work.
Jake can buy ____ apples.
Answer:
Number of apples can Jake buy = 1.
Jake can buy _1___ apples.
Explanation:
Number of quarters Jake has = 3 = 3 × 100 = 300.
Number of nickels Jake has = 4 = 4 × 5 = 20.
Cost of an apple = 204.
Total amount he has = Number of quarters Jake has + Number of nickels Jake has
= 300 + 20
= 320.
=> Number of apples can Jake buy = 1.
Question 3.
Subtract. Use the pictures of base ten pieces to help.
ex
a.
Answer:
Explanation:
Given:
Number of tens pieces = 28.
Number of hidden pieces = 12.
Subtraction:
Number of tens pieces – Number of hidden pieces
= 28 – 12
= 16.
b.
Answer:
Explanation:
Given:
Number of tens pieces = 37.
Number of hidden pieces = 17.
Subtraction:
Number of tens pieces – Number of hidden pieces
= 37 – 17
= 20.
c.
Answer:
Explanation:
Given:
Number of tens pieces = 32.
Number of hidden pieces = 15.
Subtraction:
Number of tens pieces – Number of hidden pieces
= 32 – 15
= 17.
d.
Answer:
Explanation:
Given:
Number of tens pieces = 27.
Number of hidden pieces = 19.
Subtraction:
Number of tens pieces – Number of hidden pieces
= 27 – 19
= 8.
e.
Answer:
Explanation:
Given:
Number of tens pieces = 39.
Number of hidden pieces = 14.
Subtraction:
Number of tens pieces – Number of hidden pieces
= 39 – 14
= 25.
f.
Answer:
Explanation:
Given:
Number of tens pieces = 40.
Number of hidden pieces = 25.
Subtraction:
Number of tens pieces – Number of hidden pieces
= 40 – 25
= 15.
g.
Answer:
Explanation:
Given:
Number of tens pieces = 22.
Number of hidden pieces = 8.
Subtraction:
Number of tens pieces – Number of hidden pieces
= 22 – 8
= 14.
h.
Answer:
Explanation:
Given:
Number of tens pieces = 24.
Number of hidden pieces = 12.
Subtraction:
Number of tens pieces – Number of hidden pieces
= 24 – 12
= 12.
i.
Answer:
Explanation:
Given:
Number of tens pieces = 30.
Number of hidden pieces = 15.
Subtraction:
Number of tens pieces – Number of hidden pieces
= 30 – 15
= 15.