The solutions to Bridges in Mathematics Grade 3 Student Book Answer Key Unit 1 Module 3 can help students to clear their doubts quickly.
Bridges in Mathematics Grade 3 Student Book Answer Key Unit 1 Module 3
Bridges in Mathematics Grade 3 Student Book Unit 1 Module 3 Session 1 Answer Key
Adding & Subtracting Two-Digit Numbers
Write an equation for each problem. Then solve the problem. Show your work using words, numbers, or labeled sketches. Show work in your math journal if you need extra room.
Question 1.
Sam drew a line that was 15 cm long. Then he decided he wanted a longer line, so he added 13 cm to his line. How long was Sam’s line when he finished?
Equation ______
Answer:
Number of centimeters when Sam drew a line = 15 cm
Again Number of centimeters Sam added = 13 cm
Number of centimeters after finishing = ?
= 15 + 13
= 28
Therefore line is 28 cm when Sam finished.
Question 2.
Kaya collected 26 pebbles in the park. Her sister Jayla collected 17 pebbles.
a. If they put their collections together, how many pebbles will they have in all?
Equation ______________
Answer:
Number of pebbles collected by Kaya (K)= 26
Number of pebbles collected by Jayla (J)= 17
Number of pebbles collected together = ?
Equation :Â K + J
= 26 + 17
= 43
b. If Kaya and Jayla gave their little brother 15 of the pebbles when they got home, how many pebbles would they have left?
Equation ___________
Answer:
Number of pebbles collected together= 43
Number of pebbles given for their little brother = 15
Number of pebbles left by Kaya and Jayla = x = ?
Equation : x = 43 – 15
= 28
Question 3.
CHALLENGE Sam drew some more lines.
a. He drew a second line that was half as long as the first one he ended up with in Problem 1. How long was the second line he drew?
Answer:
Number of inches he ended up in problem 1 = 43 cm
As per the given Question , second line is half of first line he draw = 43 / 2 = 21.5
Therefore the second line he draw was 21.5 cm
b. He drew a third line that was five times as long as the first. How long was the third line he drew?
Answer:
Number of inches he ended up with the first line = 43 cm
Given third line is 5 times of first line = 5 x 43 = 215 cm
Therefore Sam draw the third line in 43 cm
Bridges in Mathematics Grade 3 Student Book Unit 1 Module 3 Session 2 & 3 Answer Key
Adding Lengths
The students in Mr. C’s class measured some things around their classroom. They want to know what the total length will be if they line up some of the objects end-to-end. Help them with their work. Show your thinking with words, numbers, models, or equations. Use your math journal if you need extra room.
Question 1.
How long are the pencil and the whiteboard eraser lined up end-to-end, 19 centimeters + 15 centimeters?
Answer:
Given Length of pencil = 19 cm
Given Length of Whiteboard Eraser = 15 cm
When both Pencil and Whiteboard Eraser are lined up together = ?
= 19 + 15
= 34 cm.
Question 2.
How long are the whiteboard eraser and the piece of paper lined up, 15 centimeters + 28 centimeters?
Answer:
Whiteboard in Number of centimeters = 15
Eraser in Number of centimeters = 28
Then distance of both Whiteboard and Eraser = ?
= 15 + 28
= 43 cm
Question 3.
If you put the piece of paper (28 centimeters) besides a chair seat (that was 51 centimeters across), how many centimeters would they measure in all?
Answer:
Piece of paper placed in centimeters = 28
Chair seat in centimeters = 51
When both paper and Chair seat are measured in all = ?
= 28 + 51
= 79 centimeters.
Question 4.
The students measured 5 other things in the room, and wondered how long the line would be if they placed all 5 objects end-to-end. The things they measured were 23 centimeters, 13 centimeters, 8 centimeters, 12 centimeters, and 7 centimeters.
Answer:
Height of object 1 = 23cm
Height of object 2 = 13cm
Height of object 3 = 8cm
Height of object 4 = 12cm
Height of object 5 = 7cm
When all these are placed end -to-end in the room = ?
= 23 + 13 + 8 +12 + 7
= 63 cm
Therefore the line is 63cm tall.
Question 5.
When the book (22 centimeters) is stacked on top of the stool (99 centimeters), how tall are they together?
Answer:
Height of stool in centimeters = 99
Height of book which is on the stool = 22
Height of Stool and book together = ?
= 99 + 22
= 121
Question 6.
CHALLENGE Add 123 + 36 + 59.
Answer:
Add the given numbers 123 , 36 , 59 and then get the result as 274 as shown below
123 + 36 + 59 = 274
Bridges in Mathematics Grade 3 Student Book Unit 1 Module 3 Session 2 Answer Key
Question 1.
Count on by 10s to fill in the blanks.
a. 27 37 ____ 57 ____ ____ 87 ____ ____ ____
b. 122 ___ _____ 152 ____ ____ _____ 192 ____ ____
Answer:
a. 27 37 47 57 67 77 87 97 107 117
b. 122 132 142 152 162 172 182 192 202 212
Question 2.
Solve the problems below. Show all your work using numbers, words, or labeled sketches. Use your math journal if you need extra room.
a. Patrick measured a book that was 27 cm long. Katy measured another book that was 40 cm long. If Patrick and Katy line up the books, how long are the books together?
Answer:
Book measured by Patrick = 27 cm
Another Book measured by Katy = 40 cm
When both Patrick and another books are lined up together = ?
= 27 +40
= 67 cm
b. Abby measured 6 markers. They were each 25 cm long. If she lined them up in a row end-to-end, how long would the row be?
Answer:
Number of markers measured = 6
Each marker with a distance = 25 cm
when the markers are lined end -to-end in row = ?
= 25 x 6
= 150 cm
Therefore the row is 150 cm.
c. Colin measured a poster. The first side of the poster was 88 units long. The second side was 25 units long. How much longer was the first side than the second side of the poster?
Answer:
First side of the poster = 88 units
Second side of the poster = 25 units
Number of units of first poster than second poster = ?
= 88 – 25
= 63 units
Therefore first poster is 63 units longer than Second poster.
Question 3.
Kendra has 13 marbles in her collection. Kyle has some marbles in his collection. Together, Kendra and Kyle have 30 marbles. Which of the following equations represents this situation?
13 + m = 17
30 – 17 = m
13 + m = 30
m – 17 = 30
Answer:
Number of marbles in Kendra collection = 13
Number of some of marbles collected by Kyle = m
Both Kendra and Kyle together = 13 + m
Number of marbles that Kyle contain = 30
Therefore the Equation represents this Situation is 13 + m = 30
Bridges in Mathematics Grade 3 Student Book Unit 1 Module 3 Session 3 Answer Key
Monkeying Around
Question 1.
During the week, a monkey named Charlie ate 6 bananas, 12 pears, 14 strawberries, and 18 apples. How many pieces of fruit did Charlie eat that week? Show your work using numbers, words, or labeled sketches. Use your math journal if you need extra room.
Answer:
Number of banana pieces = 6
Number of pears pieces = 12
Number of strawberry pieces = 14
Number of Apple pieces = 18
Total number of Pieces of fruits eat that week = ?
= 6 + 12 + 14 + 18
= 50
Question 2.
The monkeys made a path around some bushes. How long is the path? Show your work.
Answer:
Given various paths done by the monkeys Let the paths be path 1 , path 2 , path3 and path 4.
path 1 = 8 ft
path 2 = 12 ft
path 3 = 7 ft
path 4 = 13 ft
Add all the different paths = path 1 + path 2 + path 3 + path 4
= 8 + 12 + 7 + 13
= 40 ft
Question 3.
Count on by 10s from each number below.
Answer:
Count the numbers by 10 whose difference between the two numbers must be 10 which are as shown below.
Question 4.
Solve each problem below. Explain your thinking in numbers, words, or labeled sketches.
a. 6 + 2 + 5 + 4 + 8 = ____
Answer:
Add the given numbers 6, 2 , 5, 4 , 8 and get the result as 25 as shown below.
6 + 2 + 5 + 4 + 8 = 25
b. 7 + 1 + 9 + 3 + 10 = ___
Answer:
Add the given numbers 7 , 1 , 9 , 3 , 10 and get the result as 30 as shown below.
7 + 1 + 9 + 3 + 10 = 30
Bridges in Mathematics Grade 3 Student Book Unit 1 Module 3 Session 4 Answer Keyn
Work Place Instructions 1E Carrot Grab
Each pair of players needs:
• 1 Carrot Grab Game Board
• 2 dice numbered 1-6
• 1 spinner overlay
• 2 game marker in different colors
• 20 game markers in a different (third) color
1. Each player (rabbit) takes a game marker and places it on the board at the beginning of the track.
2. Player 1 rolls the dice and spins the spinner. He tries to land on a multiple of 10 by hopping the number on the dice and the number of tens on the spinner. The player can split the sum in order to land on the greatest number of carrots. Player 1 takes a game marker for each carrot (multiple of 10) he lands on.
Teacher Try to land on the multiples of 10, where the carrots are. You can split up the dice hops to help you.
3. Player 2 takes a turn, repeating step 2.
4. As players take turns rolling, spinning, and moving their markers, they try to figure out how to land on a multiple of 10 without counting one by one. Players use combinations to 10 and the patterns on the game board to help.
Player 1 I am on 122 and I rolled 12 and Hop 2 Tens.
Player 2 So you want to go to 130. What is that jump? There are 3 more tracks here, then the blank spaces are 5, so 8?
Player 1 Yeah, and I know that 2 and 8 are 10, so yes, 8 to get to 130. Then I’ll hop to 140,150. Now I need to hop the rest of the 12, so that’s 4. I’m on 154. And I get 3 carrots, one for 130, 140, and 150.
5. The game is over after both players reach the end of the game board. The player with the most carrots wins the game.
Game Variation
A. Players can roll the dice twice to generate four numbers find their sum. Then they jump that amount, still trying to get as many carrots as possible by landing on as many multiples of 10 as possible. In this variation, players do not spin the spinner.
Counting On & Problem Solving
Question 1.
Count on by 10s to fill in the blanks below.
a. 54 ____ _____ ____ ___ ___ ___ ___ ____
Answer:
Count the numbers by 10 whose difference between the two numbers must be 10 which are as shown below.
54 64 74 84 94 104 114 124 134.
b. ____ ____ _____ ____ 377 ___ ___ ___ ____
Answer:
Count the numbers by 10 whose difference between the two numbers must be 10 which are as shown below.
337 347 357 367 377 387 397 407 417
c. 222 ____ _____ ____ ___ ___ ___ ___ ____
Answer:
Count the numbers by 10 whose difference between the two numbers must be 10 which are as shown below.
222 232 242 252 262 272 282 292 302
Question 2.
Lydia rides her bike 3 miles from her house to the store. Then she rides her bike 7 miles from the store to her friend’s house. Then she rides her bike home. She doesn’t know how far it is from her friend’s house to her own house, but she knows that she biked 15 miles in all. How far is it from Lydia’s friend’s house to her own house? Show your work.
Answer:
Lydia rides the bike from her house to store = 3 miles
Lydia rides the bike from store to her friend’s house = 7 miles
Then over all miles = 3 + 7= 10
But total miles she biked = 15 miles
Distance from Lydia’s friend house to her own house = ?
= 15 – 10
= 5 miles
Question 3.
a. Carrie has 27 coins. Serhat has 18 coins. How many more coins does Carrie have? Show your work.
Answer:
Number of coins that Carrie have = 27
Number of coins that Serhat have = 18
Number of more coins that Carrie have = ?
= 27 – 18
= 9
b. Rachel says this is a subtraction problem. Khan says it is an addition problem. What do you think?
Answer:
Yes of course, What Rachel says is right. Since it is a subtraction problem but not the subtraction problem.
Question 4.
Aaron has 17 cars in his collection. Amira has 12 cars in her collection. How many more cars does Aaron have? Which of the following equations represents this situation?
17 – 12 = c
17 + c = 12
c + 12 = 29
29 – 12 = c
Answer:
Number of cars in Aaron collection = 17
Number of cars in Amira collection = 12
Number of more cars that Aaron is having = c = ?
= 17 – 12
= 5
Therefore Aaron is having 5 coins and the Equation represents this situation is 17 – 12 = c
Bridges in Mathematics Grade 3 Student Book Unit 1 Module 3 Session 5 Answer Key
More Counting On & Problem Solving
Question 1.
Count on by tens to fill in the blanks below.
a. 323 333 ____ ____ ____ 373 ___ ___ ___ _____
Answer:
Count the numbers by 10 whose difference between the two numbers must be 10 which are as shown below.
323 333 343 353 363 373 383 393 403 413
b. 738 ____ ____ 768 ____ ____ ___ ___ ___ _____
Answer:
Count the numbers by 10 whose difference between the two numbers must be 10 which are as shown below.
738 748 758 768 778 788 798 808 818 828
c. 1,145 ____ 1,165 ____ ____ ___ 1,205 ___ ___ 1,235
Answer:
Count the numbers by 10 whose difference between the two numbers must be 10 which are as shown below.
1,145 1,155 1,165 1,175 1,185 1,195 1,205 1,215 1,225 1,235
Question 2.
Solve the problems below. Show all your work using numbers, words, or labeled sketches. Use your math journal if you need extra room.
a. Steven was riding his bike. First he rode to the store which took 15 minutes. Then, he rode his bike to the library, which took 17 minutes. Then, Steven rode home. The whole trip took him 47 minutes. How long did it take Steven to ride his bike home from the library?
Answer:
Steven rides the bike to reach the store = 15 minutes
Steven rides the bike to reach the Library = 17 minutes
Overall distance to reach library and store = 15 + 17 = 32 minutes.
Time taken for complete trip = 47 minutes
Steven taken to ride the bike home from the library = ?
= 47 – 32
= 15
b. On Monday, Holly rode her bike for 39 minutes. On Tuesday, she rode her bike for 26 minutes. On Wednesday, she rode for 31 minutes. How much longer did Holly ride on Monday than on Tuesday?
Answer:
Holly rode her bike on Monday = 39 minutes
Holly rode her bike on Tuesday = 26 minutes
Holly ride on Monday than on Tuesday = ?
= 39 – 26
= 13 minutes
Therefore Holly rides her bike in 13 minutes on Monday than on Tuesday.
Question 3.
Solve the following equations:
13 = ____ + 9 10 + 5 = ____ + 6 ____ = 8 + 7
7 + ____ = 6 + 3 12 = 7 + ____ 8 + 9 = 10 + _____
Answer:
Subtract 9 from 13 and get the result as 4.Then, place it in the first missing blank given.
Add both 10 and 5 get the result as 15.Then, place it in the second missing blank given
Add both 8 and 7 get the result as 17.Then, place it in the third missing blank given
13 = 4Â + 9 10 + 5 = 15 + 6Â 17= 8 + 7
Add both 6 and 3 and get the result as 9. Then , subtract 9 from 7 and get the result as 2 .Then, place 2 in the first missing blank given.
Subtract 7 from 12 and get the result as 5.Then, place it in the second missing blank given.
Add both 8 and 9 and get the result as 17. Then , subtract 10 from 17 and get the result as 7 .Then, place 7 in the third missing blank given.
7 + 2 = 6 + 3 12 = 7 + 5 8 + 9 = 10 + 7