Practicing the Bridges in Mathematics Grade 2 Student Book Answer Key Unit 3 Addition & Subtraction Within One Hundred will help students analyze their knowledge of concepts.
Bridges in Mathematics Grade 2 Student Book Answer Key Unit 3 Addition & Subtraction Within One Hundred
Bridges in Mathematics Grade 2 Student Book Unit 3 Module 1 Session 2 Answer Key
Hit the Target
Use skip-jumps on the number line to go from 0 to the circled target number in each problem.
- Use the fewest jumps of 1, 5, or 10 possible for each problem.
- You can jump forward or backward, but only by 1, 5, or 10.
- Label your jumps and also the points on the number line where you land.
ex
Question 1.
Answer: 
Explanation:
Number of jumps = 2.
Number of forward jumps = 2.
Number of backend jumps = 0.
Question 2.
Answer: 
Explanation:
Number of jumps = 3.
Number of forward jumps = 3.
Number of backend jumps = 0.
Question 3.
Answer: 
Explanation:
Number of jumps = 3.
Number of forward jumps = 1.
Number of backend jumps = 2.
Question 4.
Answer: 
Explanation:
Number of jumps = 4.
Number of forward jumps = 4.
Number of backend jumps = 0.
Question 5.
Answer: 
Explanation:
Number of jumps = 3.
Number of forward jumps = 3.
Number of backend jumps = 0.
Question 6.
Answer: 
Explanation:
Number of jumps = 2.
Number of forward jumps = 2.
Number of backend jumps = 0.
Question 7.
Answer: 
Explanation:
Number of jumps = 4.
Number of forward jumps = 4.
Number of backend jumps = 0.
Question 8.
Answer: 
Explanation:
Number of jumps = 2.
Number of forward jumps = 2.
Number of backend jumps = 0.
Challenge Problems
Question 9.
Go from 13 to 27 in as few jumps as possible. Use skip-jumps of 1, 5, or 10.
Answer: 
Explanation:
Number of jumps = 3.
Number of forward jumps = 2.
Number of backend jumps = 1.
Question 10.
Go from 21 to 38 in as few jumps as possible. Use skip-jumps of 1, 5, or 10.
Answer: 
Explanation:
Number of jumps = 4.
Number of forward jumps = 4.
Number of backend jumps = 0.
Question 11.
Make up your own problems on the three blank number lines below. You can start with any number you want, and end with any number you want.
- Write the starting number under the first mark on the line
- Write the ending target number in the circle at the end of the line.
- Go from your starting number to your ending number in as few jumps as possible. Use skip-jumps of 1, 5, or 10.
Answer: 
Explanation:
Number of jumps = 1.
Number of forward jumps = 2.
Number of backend jumps = 0.
Bridges in Mathematics Grade 2 Student Book Unit 3 Module 2 Session 2 Answer Key
Open Number Line Record Sheet
Show how you solve the story problems below.
Problem 1
Answer:
Explanation:
Number of jumps = 4.
Number of forward jumps = 4.
Number of backend jumps = 0.
Problem 2
Answer:
Explanation:
Number of jumps = 4.
Number of forward jumps = 4.
Number of backend jumps = 0.
Problem 3
Answer:
Explanation:
Number of jumps = 2.
Number of forward jumps = 2.
Number of backend jumps = 0.
Bridges in Mathematics Grade 2 Student Book Unit 3 Module 2 Session 3 Answer Key
Length Problems on the Open Number Line
Use the open number line to solve each of these problems. Be sure to label your work and show the answer.
Question 1.
Little Inch Worm is going to visit her grandma. Her grandma lives 82 inches away. Little Inch Worm has already crawled 47 inches. How many more inches does she have to crawl?
Little Inchworm has to crawl ____ more inches. 
Answer:
Number of more inches she has to crawl = 35.
Explanation:
Number of inches her grandma lives = 82.
Number of inches Little Inch Worm has already crawled = 47.
Number of more inches she has to crawl = Number of inches her grandma lives – Number of inches Little Inch Worm has already crawled
= 82 – 47
= 35.
Question 2.
We have 2 jump ropes. The red one is 120 inches long. The blue one is only 84 inches long. How many inches longer is the red rope than the blue rope?
The red jump rope is ______ inches longer than the blue jump rope.
Answer:
The red jump rope is 36 inches longer than the blue jump rope. 
Explanation:
Number of jump ropes there = 2.
Number of inches the red one = 120.
Number of inches the blue one = 84.
Difference:
Number of inches the red one – Number of inches the blue one
= 120 – 84
= 36.
Bridges in Mathematics Grade 2 Student Book Unit 3 Module 2 Session 4 Answer Key
3C Hit the Zone Record Sheet
Zone 1 26-30 Zone 3 16-20 Zone 5 6-10
Zone 2 21-25 Zone 4 11-15 Zone 6 0-5
score ____ wins ____ Losses ____ Ties
Bridges in Mathematics Grade 2 Student Book Unit 3 Module 4 Session 1 Answer Key
Many Colors Record Sheet
Question 1.
How many items do you think will be in your bag? ________
Answer:
7 items I think will be there in my bag.
Explanation:
Number of items in my bag:
1. Mobile.
2. Water bottle.
3. Book.
4. Pen.
5. Lip balm.
6. Wallet.
7. Napkin.
8. Comb
Question 2.
Which color do you think there will be the most of in your bag? ________
Answer:
White color I think there will be the most of in your bag.
Explanation:
Number of items in my bag Color of items
1. Mobile Black
2. Water bottle White
3. Book White
4. Pen Black
5. Lip balm Pink
6. Wallet Green
7. Napkin White
8. Comb Black
Question 3.
Why do you think there will be the most of that color?
Answer:
There will be the most of that color in my bag I like white color more and choose to have that color items with me.
Explanation:
Number of items in my bag Color of items
1. Mobile Black
2. Water bottle White
3. Book White
4. Pen Black
5. Lip balm Pink
6. Wallet Green
7. Napkin White
8. Comb Black
Question 4.
Do you think all the other bags of items in the room will have the most of the same color too? ________
Answer:
No, I donot think all other bags of items in the room will have the most of the same color too because different people different items in different bags and different colors.
Explanation:
All the other bags of items in the room will not have the most of the same color too because different people different tastes of liking colors.
Question 5.
Please record how many of each color you actually found in your bag.
Answer:
Color I found in your bag:
Explanation:
Number of items in my bag Color of items
1. Mobile Black
2. Water bottle White
3. Book White
4. Pen Black
5. Lip balm Pink
6. Wallet Green
7. Napkin White
8. Comb Black
Question 6.
a. How many items did you have in all? ________
Answer:
Number of items in my bag in all are 8 or Eight.
Explanation:
Number of items in my bag Color of items
1. Mobile Black
2. Water bottle White
3. Book White
4. Pen Black
5. Lip balm Pink
6. Wallet Green
7. Napkin White
8. Comb Black
b. Use the space here to show how you figured out the total number of items.
Answer:
Number of items in my bag:
1. Mobile
2. Water bottle
3. Book
4. Pen
5. Lip balm
6. Wallet
7. Napkin
8. Comb
Explanation:
Number of items in my bag Color of items
1. Mobile Black
2. Water bottle White
3. Book White
4. Pen Black
5. Lip balm Pink
6. Wallet Green
7. Napkin White
8. Comb Black
Question 7.
When you and your partner shared the items equally, how many did you each get?
Answer:
Number of items each gets = 4.
Explanation:
Number of items in my bag = 8.
Number of persons to share = 2.
Number of items each gets = Number of items in my bag ÷ Number of persons to share
= 8 ÷ 2
= 4.
Bridges in Mathematics Grade 2 Student Book Unit 3 Module 4 Session 3 Answer Key
Telling More About Our Graphs
Thinking About the Items in My Bag
Question 1.
How many items did you think you would have in your bag? ______
Answer:
10 items I expect to be in my bag.
Explanation:
Number of items i expect to be in my bag to be = 10.
Question 2.
How many items did you actually have in your bag? ________
Answer:
Number of items actually I have in my bag are Mobile, Water bottle, Book, Pen, Lip balm, Wallet, Napkin, Comb.
Explanation:
Number of items in my bag
1. Mobile
2. Water bottle
3. Book
4. Pen
5. Lip balm
6. Wallet
7. Napkin
8. Comb
Question 3.
What was the difference between your estimate and the actual number?
- Use numbers, sketches, and/or words to help solve the problem.
- Show your work below.
- Write your answer on the line.
The difference between my estimate and the number of items I actually got was _____.
Answer:
The difference between my estimate and the number of items I actually got was 2.
Explanation:
Estimation:
Number of items I estimate in my bag = 10.
Number of items actually I have in my bag = 8.
Difference:
Number of items I estimate in my bag – Number of items actually I have in my bag
= 10 – 8
= 2.
Looking at My Many Colors Graph
Question 4.
Which color did you get most of in your bag? _________
Answer:
Most color found in my bag is Black and white as I like them both.
Explanation:
Number of items in my bag Color of items
1. Mobile Black
2. Water bottle White
3. Book White
4. Pen Black
5. Lip balm Pink
6. Wallet Green
7. Napkin White
8. Comb Black
Question 5.
Which color did you think you’d get the most of? ______
Answer:
Explanation:
Number of items in my bag Color of items
1. Mobile Black
2. Water bottle White
3. Book White
4. Pen Black
5. Lip balm Pink
6. Wallet Green
7. Napkin White
8. Comb Black
Question 6.
Which color did you get the fewest of? _____
Answer:
Color which I got the Least is Pink and Green.
Explanation:
Number of items in my bag Color of items
1. Mobile Black
2. Water bottle White
3. Book White
4. Pen Black
5. Lip balm Pink
6. Wallet Green
7. Napkin White
8. Comb Black
Question 7.
Were there more browns or more yellows in your bag? _______
Answer:
There are no browns and yellows in my bag because my favourite colors are black and white, so i prefer to have my items in that color only.
Explanation:
Number of items in my bag Color of items
1. Mobile Black
2. Water bottle White
3. Book White
4. Pen Black
5. Lip balm Pink
6. Wallet Green
7. Napkin White
8. Comb Black
Question 8.
How many more? _____
Answer:
Black and White color items are more than yellow and brown in my bag.
Explanation:
Number of items in my bag Color of items
1. Mobile Black
2. Water bottle White
3. Book White
4. Pen Black
5. Lip balm Pink
6. Wallet Green
7. Napkin White
8. Comb Black
Question 9.
Write at least 3 different equations about the information on your graph.
Answer:
Total number of items in my bag = 3 + 3 + 1 + 1 = 8.
Number of items whose color is more = 3 = Black and White.
=> Number of items whose color is more = 1 = Green and Pink.
Explanation:
Equation:
1. How many total items are there in your bag.
Number of black color items in my bag = 3.
Number of white color items in my bag = 3.
Number of green color items in my bag = 1.
Number of pink color items in my bag = 1.
Total number of items in my bag = Number of black color items in my bag + Number of white color items in my bag + Number of green color items in my bag + Number of pink color items in my bag
= 3 + 3 + 1 + 1
= 6 + 1 + 1
= 7 + 1
= 8.
2. Which color items are more in your bag.
Number of black color items in my bag = 3.
Number of white color items in my bag = 3.
Number of green color items in my bag = 1.
Number of pink color items in my bag = 1.
=> Number of items whose color is more = Black and White.
3. Which color items are less in your bag.
Number of black color items in my bag = 3.
Number of white color items in my bag = 3.
Number of green color items in my bag = 1.
Number of pink color items in my bag = 1.
=> Number of items whose color is more = Green and Pink.
Number of items in my bag Color of items
1. Mobile Black
2. Water bottle White
3. Book White
4. Pen Black
5. Lip balm Pink
6. Wallet Green
7. Napkin White
8. Comb Black
Telling More About Our Graphs
Looking at a Classmate’s Many Colors Graph
Question 10.
Write the name of the person who made the graph you are using.
Answer:
Ravi is the name of the person who made the graph I am using.
Explanation:
My graph is done by me and my friend Ravi.
Question 11.
Write two problems someone could solve by looking at your partner’s graph. The problems should be the kind that can be answered with an equation.
a. Problem 1:
Answer:
Total number of items in my bag = Number of black color items in my bag + Number of white color items in my bag + Number of green color items in my bag + Number of pink color items in my bag
= 3 + 3 + 1 + 1 = 8.
Explanation:
Write the total items are in your bag.
Number of items in my bag Color of items
1. Mobile Black
2. Water bottle White
3. Book White
4. Pen Black
5. Lip balm Pink
6. Wallet Green
7. Napkin White
8. Comb Black
b. Problem 2:
Answer:
Black and White color item are more in the bag.
Explanation:
Which color item are more in the bag.
Number of items in my bag Color of items
1. Mobile Black
2. Water bottle White
3. Book White
4. Pen Black
5. Lip balm Pink
6. Wallet Green
7. Napkin White
8. Comb Black
Question 12.
Now solve the two problems you just posed about your partner’s graph. Use an equation to show and solve each problem.
a. Equation for and answer to Problem 1:
Answer:
Total number of items in my bag = Number of black color items in my bag + Number of white color items in my bag + Number of green color items in my bag + Number of pink color items in my bag
= 3 + 3 + 1 + 1 = 8.
Explanation:
Write the total items are in your bag.
Number of items in my bag Color of items
1. Mobile Black
2. Water bottle White
3. Book White
4. Pen Black
5. Lip balm Pink
6. Wallet Green
7. Napkin White
8. Comb Black
b. Equation for and answer to Problem 2:
Answer:
Black and White color item are more in the bag.
Explanation:
Which color item are more in the bag.
Number of items in my bag Color of items
1. Mobile Black
2. Water bottle White
3. Book White
4. Pen Black
5. Lip balm Pink
6. Wallet Green
7. Napkin White
8. Comb Black
Question 13.
Share your problems and equations with your partner.
Answer:
Total number of items in my bag = Number of black color items in my bag + Number of white color items in my bag + Number of green color items in my bag + Number of pink color items in my bag
= 3 + 3 + 1 + 1 = 8.
2. Color items more in my bag = 3 = Black and White.
Explanation:
1. Write the total items are in your bag.
Answer:
Total number of items in my bag = Number of black color items in my bag + Number of white color items in my bag + Number of green color items in my bag + Number of pink color items in my bag
= 3 + 3 + 1 + 1 = 8.
Number of items in my bag Color of items
1. Mobile Black
2. Water bottle White
3. Book White
4. Pen Black
5. Lip balm Pink
6. Wallet Green
7. Napkin White
8. Comb Black
2. Which color item are more in the bag.
Answer:
Number of black color items in my bag = 3.
Number of white color items in my bag = 3.
Number of green color items in my bag = 1.
Number of pink color items in my bag = 1.
=> Color items more in my bag = 3 = Black and White.