The solutions to Bridges in Mathematics Grade 3 Home Connections Answer Key Unit 3 Module 2 can help students to clear their doubts quickly.
Bridges in Mathematics Grade 3 Home Connections Answer Key Unit 3 Module 2
Bridges in Mathematics Grade 3 Home Connections Unit 3 Module 2 Session 1 Answer Key
Rounding to Tens & Hundreds
Note to Families
This worksheet gives students practice rounding to the nearest ten and hundred. Round numbers to the nearest ten by checking the digit in the ones place. If that digit is 5 or greater, round up to the next ten. If the digit is 4 or less, the digit in the tens place stays the same. When you round to the nearest hundred, check the digit in the tens place. If that digit is 5 or greater, round up to the next hundred. If that digit is 4 or less, the digit in the hundreds place stays the same.
Question 1.
Round the following numbers to the nearest 10.
Answer:
Explanation:
Given numbers:
Rounding to nearest ten:
32 – lesser – 30.
378 – greater – 380.
87 – greater – 90.
1,055 – greater – 1100.
63 – lesser – 60.
Question 2.
Round the following numbers to the nearest 100.
Answer:
Explanation:
Given numbers:
Rounding to nearest ten:
213 – lesser – 210.
347 – greater – 350.
59 – greater – 60.
408 – greater – 410.
2,665 – greater – 2670.
Question 3.
Round the following:
Answer:
Explanation:
Nearest to ten Nearest to hundred
26 – 30. 0.
493 – 490. 500.
1,845 – 1850. 1800.
802 – 800. 800.
199 – 200. 200.
Show all your work for these problems.
Question 4.
Andy’s class wants to help poor families in Guatemala grow their own food. A $35 donation to a relief organization will provide a family with the seeds and tools they need to build a vegetable garden.
a. Mark the most reasonable estimate for how much it would cost to help 4 families build vegetable gardens:
$75.00
$100.00
$140.00
$200.00
Answer:
Total amount will be costed for families build vegetable gardens = $140.
$140.00
Explanation:
Amount of money for donation = $35.
Number of families = 4.
Total amount will be costed for families build vegetable gardens = Amount of money for donation × Number of families
= $35 × 4
= $140.
b. What is the exact cost of seeds and tools for 4 family gardens through the relief organization?
Answer:
The exact cost of seeds and tools for 4 family gardens through the relief organization would be $140.
Explanation:
Amount of money for donation = $35.
Number of families = 4.
Total amount will be costed for families build vegetable gardens = Amount of money for donation × Number of families
= $35 × 4
= $140.
c. If Andy’s class raises $167, how much money will be left over?
Answer:
Amount of money will be left over = $27.
Explanation:
Amount of money Andy’s class raises = $167.
Total amount will be costed for families build vegetable gardens = $140.
Amount of money will be left over = Amount of money Andy’s class raises – Total amount will be costed for families build vegetable gardens
= $167 – $140
= $27.
Question 5.
CHALLENGE A donation of $75 to the relief organization can bring a health counselor to a poor neighborhood in Indonesia to help mothers improve their children’s health. Ms. Murray and Mr. Austin both have 30 students in their classes. If each child gives $5, how many neighborhoods can they provide health counselors for?
Answer:
Number of neighborhoods can they provide health counselors for = 2.
Explanation:
Amount of money of donation to the relief organization can bring a health counselor to a poor neighborhood in Indonesia to help mothers improve their children’s health = $75.
Number of children Ms. Murray and Mr. Austin both have in their classes = 30.
Amount of money each child gives = $5.
Total amount collected from children = Number of children Ms. Murray and Mr. Austin both have in their classes × Amount of money each child gives
= 30 × $5
= $150.
Number of neighborhoods can they provide health counselors for = Total amount collected from children ÷ Amount of money of donation to the relief organization can bring a health counselor to a poor neighborhood in Indonesia to help mothers improve their children’s health
= $150 ÷ $75
= 2.
Bridges in Mathematics Grade 3 Home Connections Unit 3 Module 2 Session 3 Answer Key
Two-Digit Addition, Card Collecting & Shopping
Question 1.
Add each pair of numbers. Show all your work.
a. 30 + 65 = ____
Answer:
Explanation:
Given Equation:
30 + 65 = 95.
=> Adding 30 plus 65, gives sum of 95.
b. 42 + 35 = ____
Answer:
Explanation:
Given Equation:
42 + 35 = 77.
=> Adding 42 plus 35, gives sum of 77.
c. 46 + 38 = ____
Answer:
Explanation:
Given Equation:
46 + 38 = 84.
=> Adding 46 plus 38, gives sum of 84.
d.
Answer:
Explanation:
Given Equation:
53 + 82 = 135.
=> Adding 53 plus 82, gives sum of 135.
e.
Answer:
Explanation:
Given Equation:
67 + 85 = 152.
=> Adding 67 plus 85, gives sum of 152.
f.
Answer:
Explanation:
Given Equation:
94 + 76 = 170.
=> Adding 94 plus 76, gives sum of 170.
Question 2.
Henry had 126 baseball cards. His cousin gave him 20 more cards. Then Henry gave his brother 58 cards. How many baseball cards does Henry have now? Show all your work.
Answer:
Number of baseball cards does Henry have now = 88.
Explanation:
Number of baseball cards Henry had = 126.
Number of baseball cards his cousin gave him more = 20.
Number of baseball cards Henry gave his brother = 58.
Number of baseball cards does Henry have now = (Number of baseball cards Henry had + Number of baseball cards his cousin gave him more) – Number of baseball cards Henry gave his brother
= (126 + 20 ) – 58
= 146 – 58
= 88.
Show your work when you solve these problems.
Question 3.
DVD players are on sale for $84. That’s $35 off the regular price. What is the regular price?
Answer:
Cost of regular price = $119.
Explanation:
Cost of DVD players on sale = $84.
Discount cost off the regular price = $35.
=> Cost of regular price + Discount cost off the regular price = Cost of DVD players on sale
=> ?? + $35 = $84
=> ?? = $84 – $35
=> ?? = $119.
Question 4.
CHALLENGE MP3 players cost $85 each. Mark has a coupon that will take $15 off the total if he buys two. If he uses his coupon, how much will Mark pay for two MP3 players?
Answer:
Amount of money Mark pays for two MP3 players if he uses his coupon = $155.
Explanation:
Cost of MP3 players each = $85.
Cost of Mark has a coupon that has off the total if he buys two = $15.
Amount of money Mark pays for two MP3 players if he uses his coupon = (2 × Cost of MP3 players each) – Cost of Mark has a coupon that has off the total if he buys two
= (2 × $85) – $15
= $170 – $15
= $155.
Bridges in Mathematics Grade 3 Home Connections Unit 3 Module 2 Session 5 Answer Key
Construction Paper, Scooters & Snails
Question 1.
Solve the subtraction problems. Show all your work.
a. 67 – 28 =
Answer:
Explanation:
Given Equation:
67 – 28 = 39.
=> 67 minus 28 equals 39.
b. 83 – 37 =
Answer:
Explanation:
Given Equation:
83 – 37 = 46.
=> 83 minus 37 equals 46.
c. 92 – 54 =
Answer:
Explanation:
Given Equation:
92 – 54 = 38.
=> 92 minus 54 equals 38.
d. 500 – 199 =
Answer:
Explanation:
Given Equation:
500 – 199 = 301.
=> 500 minus 199 equals 301.
Question 2.
Mr. Jones needs 126 pieces of construction paper to do an art project with his students. He has a full pack with 50 sheets of paper and an open pack with some more sheets. How many more sheets of paper does he need to borrow from the teacher next door?
a. Choose the information that will help you solve the problem.
There are 24 students in the class.
The open pack has 17 sheets of paper.
Packs of construction paper cost $3 each.
He has 32 pencils.
Answer:
Number of more sheets of paper does he need to borrow from the teacher next door = 59.
The open pack has 17 sheets of paper.
Explanation:
Number of pieces of construction paper to do an art project with his students Mr. Jones needs = 126.
Number of sheets of paper he has a full pack = 50.
The open pack has 17 sheets of paper.
=> Number of sheets of paper open pack has = 17.
Number of more sheets of paper does he need to borrow from the teacher next door = Number of pieces of construction paper to do an art project with his students Mr. Jones needs – (Number of sheets of paper he has a full pack + Number of sheets of paper open pack has)
= 126 – (50 + 17)
= 126 – 67
= 59.
b. Solve the problem. Show all your work. Write your answer on the line at the bottom of the page.
Mr. Jones needs to borrow ____ more sheets of paper.
Answer:
Number of more sheets of paper does he need to borrow from the teacher next door = 59.
Mr. Jones needs to borrow 59 more sheets of paper.
Explanation:
Number of pieces of construction paper to do an art project with his students Mr. Jones needs = 126.
Number of sheets of paper he has a full pack = 50.
The open pack has 17 sheets of paper.
=> Number of sheets of paper open pack has = 17.
Number of more sheets of paper does he need to borrow from the teacher next door = Number of pieces of construction paper to do an art project with his students Mr. Jones needs – (Number of sheets of paper he has a full pack + Number of sheets of paper open pack has)
= 126 – (50 + 17)
= 126 – 67
= 59.
Question 3.
Angela wants to buy a scooter. She has saved $57 from birthday money and $19 more by doing gardening jobs for neighbors. The scooter costs $125. How much more money does Angela need?
a. Estimate the amount of money Angela still needs, and explain your thinking. How did you get your estimate?
Answer:
Amount of more money Angela needs = $49.
Explanation:
Amount of money she has saved from birthday money = $57.
Amount of money she has saved more by doing gardening jobs for neighbors = $19.
Cost of the scooter = $125.
Amount of more money Angela needs = Cost of the scooter – (Amount of money she has saved from birthday money + Amount of money she has saved more by doing gardening jobs for neighbors)
= $125 – ($57 + $19)
= $125 – $76
= $49.
b. Which equation does not represent this problem? (The letter m stands for money.)
$57 + $19 + m = $125
$125 – $57 – $19 = m
$125 + $57 + $19 = m
$125 – m = $57 + $19
Answer:
Equation does not represent this problem: $125 + $57 + $19 = m (no)
$57 + $19 + m = $125. (yes)
$125 – $57 – $19 = m (yes)
$125 + $57 + $19 = m (no)
$125 – m = $57 + $19 (yes)
Explanation:
Amount of money she has saved from birthday money = $57.
Amount of money she has saved more by doing gardening jobs for neighbors = $19.
Cost of the scooter = $125.
Amount of more money Angela needs = Cost of the scooter – (Amount of money she has saved from birthday money + Amount of money she has saved more by doing gardening jobs for neighbors)
= $125 – ($57 + $19)
= $125 – $76
= $49.
Given Equations:
$57 + $19 + m = $125. (yes)
$125 – $57 – $19 = m (yes)
$125 + $57 + $19 = m (no)
$125 – m = $57 + $19 (yes)
c. Figure out how much more money Angela actually needs to buy the scooter. Show your work.
Answer:
Amount of more money Angela needs actually needs to buy the scooter = $49.
Explanation:
Amount of money she has saved from birthday money = $57.
Amount of money she has saved more by doing gardening jobs for neighbors = $19.
Cost of the scooter = $125.
Amount of more money Angela needs = Cost of the scooter – (Amount of money she has saved from birthday money + Amount of money she has saved more by doing gardening jobs for neighbors)
= $125 – ($57 + $19)
= $125 – $76
= $49.
Question 4.
CHALLENGE Lucy, a garden snail, laid 4 batches of eggs one summer. Each batch had 53 eggs, but 17 eggs from each batch didn’t survive. How many of Lucy’s eggs hatched into baby snails?
a. Write an equation to represent this problem. Use the letter s to stand for baby snails.
Answer:
Number of Lucy’s eggs hatched into baby snails (s) = 144.
Explanation:
Number of batches of eggs one summer Lucy, a garden snail, laid = 4.
Number of eggs each batch has = 53.
Number of eggs from each batch didn’t survive = 17.
Total number of eggs Lucy laid = Number of batches of eggs one summer Lucy, a garden snail, laid × Number of eggs each batch has
= 4 × 53
= 212.
Total number of eggs didn’t survive = Number of batches of eggs one summer Lucy, a garden snail, laid × Number of eggs from each batch didn’t survive
= 4 × 17
= 68.
Number of Lucy’s eggs hatched into baby snails (s) = Total number of eggs Lucy laid – Total number of eggs didn’t survive =
= 212 – 68
= 144.
b. Solve the problem. Show all of your work.
Answer:
Number of Lucy’s eggs hatched into baby snails (s) = 144.
Explanation:
Number of batches of eggs one summer Lucy, a garden snail, laid = 4.
Number of eggs each batch has = 53.
Number of eggs from each batch didn’t survive = 17.
Total number of eggs Lucy laid = Number of batches of eggs one summer Lucy, a garden snail, laid × Number of eggs each batch has
= 4 × 53
= 212.
Total number of eggs didn’t survive = Number of batches of eggs one summer Lucy, a garden snail, laid × Number of eggs from each batch didn’t survive
= 4 × 17
= 68.
Number of Lucy’s eggs hatched into baby snails (s) = Total number of eggs Lucy laid – Total number of eggs didn’t survive =
= 212 – 68
= 144.