The answers to Bridges in Mathematics Grade 1 Student Book Answer Key Unit 3 Adding, Subtracting, Counting & Comparing are undoubtedly the best study material a student can get hold of.
Bridges in Mathematics Grade 1 Student Book Answer Key Unit 3 Adding, Subtracting, Counting & Comparing
Bridges in Mathematics Grade 1 Student Book Unit 3 Module 1 Session 1 Answer Key
Drop the Beans Sevens Record Sheet
Record the number of red beans first, and then the white beans.
Answer:
First drop the beans
Now record them
The no of red beans are 4 and white beans 3.
Again drop the beans
Record them
The no of read beans are 3 and white beans 4.
Now let us check the figure.
Explanation:
Bridges in Mathematics Grade 1 Student Book Unit 3 Module 2 Session 3 Answer Key
Make Ten
Question 1.
Write and solve an addition fact to match each of the number racks.
ex
a.
Answer:
The number of balls is 10 balls.
Explanation:
As there are 8 balls in the upper rack and 2 balls in the lower rack. So the number of balls will be 10 balls.
b.
Answer:
The number of balls is 10 balls.
Explanation:
As there are 7 balls in the upper rack and 3 balls in the lower rack. So the number of balls will be 10 balls.
c.
Answer:
The number of balls is 10 balls.
Explanation:
As there are 6 balls in the upper rack and 4 balls in the lower rack. So the number of balls will be 10 balls.
d.
Answer:
The number of balls is 10 balls.
Explanation:
As there are 5 balls in the upper rack and 5 balls in the lower rack. So the number of balls will be 10 balls.
e.
Answer:
The number of balls is 10 balls.
Explanation:
As there are 4 balls in the upper rack and 6 balls in the lower rack. So the number of balls will be 10 balls.
f.
Answer:
The number of balls is 10 balls.
Explanation:
As there are 3 balls in the upper rack and 7 balls in the lower rack. So the number of balls will be 10 balls.
g.
Answer:
The number of balls is 10 balls.
Explanation: There are 2 balls in the upper rack and 8 balls in the lower rack. So the number of balls will be 10 balls.
h.
Answer:
The number of balls is 10 balls.
Explanation:
As there are 1 ball in the upper rack and 9 balls in the lower rack. So the number of balls will be 10 balls.
i.
Answer:
The number of balls is 10 balls.
Explanation:
As there are 0 balls in upper rack and 10 balls in the lower rack. So the number of balls will be 10 balls.
Question 2.
Solve each of the problems below. Write the answers on the lines.
a. I have six (6) beads. How many more to make ten? _______
Answer:
To make ten we need to add 4 beads.
Explanation:
As I have 6 beads, so to make ten we need to add 10-6 which are 4 beads.
b. I have three (3) beads. How many more to make ten? _______
Answer:
To make ten we need to add 7 beads.
Explanation:
As I have 3 beads, so to make ten we need to add 10-7 which are 7 beads.
c. I have eight (8) beads. How many more to make ten? _______
Answer:
To make ten we need to add 2 beads.
Explanation:
As I have 8 beads, so to make ten we need to add 10-2 which are 2 beads.
d. I have two (2) beads. How many more to make ten? ________
Answer:
To make ten we need to add 8 beads.
Explanation:
As I have 2 beads, so to make ten we need to add 10-2 which are 8 beads.
e. I have five (5) beads. How many more to make ten? _______
Answer:
To make ten we need to add 5 beads.
Explanation:
As I have 5 beads, so to make ten we need to add 10-5 which 5 beads.
Question 3.
Subtract. Use your number rack to help if you like.
Answer:
Explanation:
Question 4.
There were some apples in the bowl. The kids ate 3 of them. Now there are only 7 apples left in the bowl. How many apples were in the bowl to start?
There were ____ apples in the bowl to start.
Answer:
There were 10 apples in the bowl to start.
Explanation:
Given,
The kids ate 3 of them.
Now there are only 7 apples left in the bowl.
There were 3 + 7 = 10 apples in the bowl to start.
Question 5.
ÇHALLENGE Sara had some marbles. She got 20 more marbles for her birthday, and she got 30 marbles at the store. Now Sara has 100 marbles. How many marbles did she have to start? Show your work.
Sara had ___ marbles to start.
Answer:
Sara had 50 marbles to start.
Explanation:
Given,
Sara has 100 marbles.
She got 20 more marbles for her birthday, and she got 30 marbles at the store.
100 – (20 + 30)
100 – 50
50
Bridges in Mathematics Grade 1 Student Book Unit 3 Module 2 Session 4 Answer Key
How many balloons are behind the clouds?
Question 1.
Complete the equations to match each of the pictures below. For each one, first record the number of balloons you can see and then the number of balloons that are hidden behind the clouds.
a.
Answer:
The number of balloons that are hidden behind the clouds are 10 = 5 + 5.
Explanation:
b.
Answer:
The number of balloons that are hidden behind the clouds are 10 = 3 + 7.
Explanation:
c.
Answer:
The number of balloons that are hidden behind the clouds are 10 = 4 + 6.
Explanation:
d.
Answer:
The number of balloons that are hidden behind the clouds are 10 = 5 + 5.
Explanation:
e.
Answer:
The number of balloons that are hidden behind the clouds are 10 = 2 + 8.
Explanation:
f.
Answer:
The number of balloons that are hidden behind the clouds are 10 = 3 + 7.
Explanation:
g.
Answer:
The number of balloons that are hidden behind the clouds are 10 = 4 + 6.
Explanation:
Question 2.
How many balloons do you see in this picture? _________
Answer:
I have seen a total of 20 balloons in the given picture.
Question 3.
Complete the equations to match each of the pictures below. For each one, first record the number of balloons you can see and then the number of balloons that are hidden behind the clouds.
a.
Answer:
The number of balloons that are hidden behind the clouds are 20 = 1 + 19.
Explanation:
b.
Answer:
The number of balloons that are hidden behind the clouds are 20 = 5 + 15.
Explanation:
c.
Answer:
The number of balloons that are hidden behind the clouds are 20 = 9 + 11.
Explanation:
d.
Answer:
The number of balloons that are hidden behind the clouds are 20 = 8 + 12.
Explanation:
e.
Answer:
The number of balloons that are hidden behind the clouds are 20 = 8 + 12.
Explanation:
Question 4.
CHALLENGE Now imagine 20 hot air balloons racing across the sky, and solve these problems.
How many are hidden behind the clouds?
a. I can see only 13 of the balloons. _______
Answer:
The hidden balloons are 7 balloons.
Explanation:
As I can see there are only 13 of the balloons as 20 hot air balloons racing across the sky. So the hidden balloons are 20-13 which is 7 balloons.
b. I can see only 9 of the balloons. _______
Answer:
The hidden balloons are 11 balloons.
Explanation:
As I can see there are only 9 of the balloons as 20 hot air balloons race across the sky. So the hidden balloons are 20-9 which is 11 balloons.
c. I can see only 16 of the balloons. _______
Answer:
The hidden balloons are 4 balloons.
Explanation:
As I can see there are only 16 of the balloons as 20 hot air balloons racing across the sky. So the hidden balloons are 20-16 which is 4 balloons.
d. I can see only 8 of the balloons. _____
Answer:
The hidden balloons are 12 balloons.
Explanation:
As I can see there are only 8 of the balloons as 20 hot air balloons race across the sky. So the hidden balloons are 20-8 which is 12 balloons.
Bridges in Mathematics Grade 1 Student Book Unit 3 Module 3 Session 1 & 2 Answer Key
Number in My Pocket
Game 1
Answer:
The numbers in my pocket are 10, 18, 38 and 47.
Explanation:
Game 2
Answer:
The numbers in my pocket are 7, 12, 34 and 49.
Explanation:
Game 3
Answer:
The numbers in my pocket are 1, 14, 28, 40 and 41.
Explanation:
Game 4
Answer:
The numbers in my pocket are 2, 19, 23 and 42.
Explanation:
Bridges in Mathematics Grade 1 Student Book Unit 3 Module 3 Session 4 Answer Key
3F Fifty or Bust! Record Sheet
Answer:
Let us add the numbers 10 and 10. The answer is 20. Now fill in the figure to show how we added the numbers.
Check the figure for other addition of the numbers.
Explanation: