The solutions to Bridges in Mathematics Grade 3 Home Connections Answer Key Unit 1 Module 2 can help students to clear their doubts quickly.
Bridges in Mathematics Grade 3 Home Connections Answer Key Unit 1 Module 2
Bridges in Mathematics Grade 3 Home Connections Unit 1 Module 2 Session 1 Answer Key
Addition & Subtraction Review
Note to Families
Students have reviewed and explored addition facts and strategies, and they are now investigating subtraction facts. Naming, categorizing, and identifying strategies will help your child not only understand and solve basic subtraction facts but also solve larger subtraction problems. These strategies help students develop a better understanding of the relationship between numbers and operations. Encourage your child to share with you the fact strategies we have used in the classroom. If your child is having trouble remembering the names of the strategies, the chart at the bottom of page 5 will help.
Question 1.
Complete these subtraction facts.
5 – 2 = ____ 8 – 3 = ____ 6 – 1 = _____ 9 – 2 = _____
Answer:
Subtraction with small numbers can be done horizontally.
5 – 2 = 3
8 – 3 = 5
6 – 1 = 5
9 – 2 = 7
Question 2.
Complete these subtraction facts.
12 – 6 = ____ 8 – 4 = ____ 16 – 8 = _____ 14 – 7 = _____
Answer:
Subtraction with small numbers can be done horizontally.
12 – 6 = 6
8 – 4 = 4
16 – 8 = 8
14 – 7 = 7
Question 3.
What do the facts in Problem 2 have in common?
Answer:
The difference is always equal to the subtrahend.
The minuend is always even.
The minuend is always twice the subtrahend.
Question 4.
Complete these subtraction facts.
Answer:
Subtraction with small numbers can be done horizontally.
Question 5.
Complete these subtraction facts.
19 – 9 = ____ 12 – 2 = ____ 17 – 7 = ____ 14 – 4 = _____
Answer:
Subtraction with small numbers can be done horizontally.
19 – 9 = 10
12 – 2 = 10
17 – 7 = 10
14 – 4 = 10
Question 6.
What is the name for facts like those in Problem 5?
Answer: The name for facts like those in Problem 5 is back to ten facts.
Question 7.
There are 13 blue marbles and 7 red marbles in a bag. How many more blue marbles than red marbles are in the bag? Keona says this is a subtraction problem. Tamron says it is an addition problem. What do you think? Why?
Answer:
Given,
There are 13 blue marbles and 7 red marbles in a bag.
13 – 7 = 6
Question 8.
Complete these addition facts.
Answer:
Question 9.
Complete each equation with a different pair of numbers whose difference is 6.
a.
____ – ____ = 6
Answer:
12 – 6 = 6
b.
____ – ____ = 6
Answer:
10 – 4 = 6
Question 10.
Lisa and her dad are peeling apples to make some apple pies. The pies need 14 apples. Lisa and her dad have peeled 5 apples.
a. Is there an odd or even number of apples left to peel? How do you know?
Answer:
Odd number of apples left to peel.
b. How many apples are left to peel? Show your work.
Answer:
Given,
Lisa and her dad are peeling apples to make some apple pies.
The pies need 14 apples. Lisa and her dad have peeled 5 apples.
14 – 5 = 9
Question 11.
CHALLENGE Lisa has 32 clean dishes to put away after emptying the dishwasher. After she put away 4 dishes, she helped her mother bring groceries in from the car. Then she put away 7 more dishes. How many dishes still need to be put away? Show your work.
Answer:
Given,
Lisa has 32 clean dishes to put away after emptying the dishwasher.
After she put away 4 dishes, she helped her mother bring groceries in from the car. Then she put away 7 more dishes.
32 – 7 – 4 = 21
She need to put 21 dishes.
Bridges in Mathematics Grade 3 Home Connections Unit 1 Module 2 Session 3 Answer Key
Of Mice & Moles
For problems 1-3, show your work using numbers, words, or labeled sketches.
Question 1.
Xavier watched a mouse walk this path. How far did the mouse travel?
Answer:
8 + 3 + 10 = 21 feet
Question 2.
A mole was burrowing in a field. First, the mole went 6 meters in one direction, then 8 meters in another direction, and then 4 meters in another direction. How far did the mole burrow?
Answer:
Given,
A mole was burrowing in a field. First, the mole went 6 meters in one direction, then 8 meters in another direction, and then 4 meters in another direction.
6 + 8 + 4 = 18 meters
Question 3.
a. Charlie T. Mole ate 16 insects. Anabel H. Mole ate 26 insects. How many more insects did Anabel eat?
Answer:
Charlie T. Mole ate 16 insects. Anabel H. Mole ate 26 insects.
26 – 16 = 10
Anabel ate 10 more insects
b. Peter says this is a subtraction problem. Gladys says it is an addition problem. What do you think? Why?
Answer: Peter is correct we can use subtraction facts.
Question 4.
The difference of two numbers is 7 List three possible equations that have a difference of 7.
____ – ____ = 7 ____ – ____ = 7 ____ – ____ = 7
Answer:
14 – 7 = 7
18 – 11 = 7
17 – 10 = 7
Question 5.
Write an equation that could represent this picture.
Answer:
9 + 4 = 13
5 + 4 + 4 = 13
8 + 5 = 13
Question 6.
CHALLENGE Abel S. Mouse searched for food for 28 minutes. He found a snack and spent 10 minutes eating his snack. How much longer did it take Abel S. Mouse to find his snack than it took him to eat it? Which of the following represents this situation?
28 + s = 10
10 + 28 = s
38 – s = 28
28 – 10 = s
Answer:
bel S. Mouse searched for food for 28 minutes. He found a snack and spent 10 minutes eating his snack.
28 – 10 = s
Option D is the correct answer.
Question 7.
Jana practiced the piano 10 minutes longer than her brother, Grant. Jana practiced for 35 minutes. How long did Grant practice? Show your work.
Answer:
Given,
Jana practiced the piano 10 minutes longer than her brother, Grant. Jana practiced for 35 minutes.
35 – 10 = 25 minutes
Grant practiced 25 minutes.
Question 8.
CHALLENGE Lulu practiced the piano for 45 minutes, and then she practiced the violin for 30 minutes.
a. How much time did Lulu spend practicing her instruments? Show your work.
Answer:
Given,
Lulu practiced the piano for 45 minutes, and then she practiced the violin for 30 minutes.
45 + 30 = 75 minutes
b. Is that more or less than an hour? How do you know?
Answer: More than an hour
c. How many minutes more or less than an hour did Lulu practice? Show your work.
Answer:
75 – 60 = 15 minutes
15 minutes more than an hour.