This handy Math in Focus Grade 1 Workbook Answer Key Chapter 4 Subtraction Facts to 10 detailed solutions for the textbook questions.
Math in Focus Grade 1 Chapter 4 Answer Key Subtraction Facts to 10
Math Journal
Color some bunnies brown. Then make a subtraction sentence.
Question 1.
Sally has 9 bunnies.
_______ bunnies are brown.
How many bunnies are white?
________ bunnies are white.
Answer:
Explanation:
Sally has 9 bunnies.
9 bunnies are brown.
9 – 9 = 0
There are 0 bunnies which are white.
Draw some balls ¡n the drawer.
Cross some out.
Then make a subtraction sentence.
Question 2.
Jane has ________ balls.
Her dog chews _______ of the balls.
How many balls does she have left?
Jane has _______ balls left.
Answer:
Explanation:
Jane has 6 balls.
Her dog chews 2 of the balls.
6 – 2 = 4
The dog left 4 balls.
Put On Your Thinking cap!
challenging practice
Pick three numbers to make a fact family. Then write each fact family.
Question 1.
Answer:
Explanation:
An addition fact is the sum of two specific addends that will always equal the same result.
A subtraction fact family is a group of related math facts that use the same three numbers. Subtraction fact families also include addition, which is the inverse or opposite operation of subtraction.
Question 2.
Answer:
Explanation:
An addition fact is the sum of two specific addends that will always equal the same result.
A subtraction fact family is a group of related math facts that use the same three numbers. Subtraction fact families also include addition, which is the inverse or opposite operation of subtraction.
Put On Your Thinking Cap!
Problem Solving
Read this riddle.
Example
I think of two numbers.
When I add the numbers, the answer is 5.
0 + 5 = 5
1 + 4 = 5
2 + 3 = 5
When I subtract the numbers, the answer is 1.
5 – 0 = 5 ✗
4 – 1 = 3 ✗
3 – 2 = 1 ✓
What are the two numbers?
The two numbers are 2 and 3.
Now you try.
I think of two numbers.
When I add the numbers, the answer is 8.
When I subtract the numbers, the answer is less than 6.
What can the two numbers be?
The two numbers can be ___ and ____
Answer:
6 and 2
Explanation:
Let the 2 numbers are 2 and 6
2 + 6 = 8
6 – 2 = 4
4 < 6
so, My numbers satisfy all the conditions.
Chapter Review/Test
Vocabulary
Choose the correct word.
Question 1.
+ is plus, – is ____
Answer:
Minus
Explanation:
+ is plus, – is minus
they are the symbols used for representing addition and subtraction.
Question 2.
3 is ___ 7.
Answer:
Less than
Explanation:
number 3 is lesser than 7
3 < 7
Question 3.
8 – 2 means to ___ 2 from 8.
Answer:
Take away
Explanation:
If we take away 2 from 8 then the difference is 6
8 – 2 = 6
Question 4.
4 – 3 = 1 is a ____
Answer:
Subtraction sentence.
Explanation:
An subtraction sentence is a number sentence or simply an equation used to express subtraction. For example, 5 – 3 = 2 is a subtraction sentence.
Concepts and Skills
Complete each subtraction sentence.
Question 5.
Answer:
8 – 3 = 5
Explanation:
There are 8 balls from that 3 are used
8 – 3 = 5
so, 5 are un used balls.
Question 6.
What is 4 less than 6?
Answer:
6 – 4 = 2
Explanation:
4 less than 6 is 2
In a ten frame there are 6 dots from that 4 are crossed
so, 2 are remaining.
Question 7.
What is 3 less than 9?
9 – ___ = ___
Answer:
9 – 3 = 6
Explanation:
3 less than 9 is 6
In a ten frame there are 9 dots from that 3 are crossed
so, 6 are remaining.
Count on from the number which is less.
Question 8.
6 – 3 = ___
Answer:
3
Explanation:
6 – 3 = 3
The difference of 6 and 3 is 3
Question 9.
9 – 7 = ___
Answer:
2
Explanation:
9 – 7 = 2
The difference of 9 and 7 is 2
Count back from the greater number.
Question 10.
10 – 5 = ___
Answer:
5
Explanation:
10 – 5 = 5
The difference of 10 and 5 is 5
Question 11.
7 – 6 = ___
Answer:
1
Explanation:
7 – 6 = 1
The difference of 7 and 6 is 1
Complete the number bond.
Then complete the subtraction sentence.
Question 12.
7 – 2 = ?
Answer:
Explanation:
The number bond explains the subtraction sentence
7 – 2 = 5
Question 13.
? – 2 = 8
Answer:
Explanation:
The number bond explains the subtraction sentence
10 – 2 = 8
Subtract.
Use related facts.
Question 14.
8 – 4 = ___
Answer:
4
Explanation:
8 – 4 = 4
The difference of 8 and 4 is 4
Question 15.
7 – 3 = ___
Answer:
4
Explanation:
7 – 3 = 4
The difference of 7 and 3 is 4
Question 16.
10 – ___ = 7
Answer:
3
Explanation:
10 – 3 = 7
The difference of 10 and 7 is 3
Question 17.
5 – ___ = 5
Answer:
0
Explanation:
5 – 0 = 5
The difference of 5 and 0 is 5
Write a subtraction story.
Question 18.
Answer:
Explanation:
9 – 5 = 4
For the subtraction sentence created a subtraction story.
Write a fact family.
Question 19.
Answer:
Explanation:
An addition fact is the sum of two specific addends that will always equal the same result.
A subtraction fact family is a group of related math facts that use the same three numbers. Subtraction fact families also include addition, which is the inverse or opposite operation of subtraction.
Problem Solving.
Draw 
Cross them out to solve.
Then write a number sentence.
Question 20.
James has 9 fish in his fish tank. He gives his friend 4 fish. How many fish does he have left?
____ – ___ = ____
James has ___ fish left.
Answer:
Explanation:
James has 9 fish in his fish tank. He gives his friend 4 fish.
9 – 4 = 5
James has 5 fish left.
Solve.
Use related facts to help you.
Question 21.
Mr. Peterson bakes 10 pies. He eats some of them. He now has 8 pies. How many pies did he eat?
10 – ___ = 8
Mr. Peterson ate ____ pies.
Answer:
10 – 2 = 8
Explanation:
10 – 8 = 2
Mr. Peterson bakes 10 pies. He eats some of them. He now has 8 pies.
10 – 2 = 8
Mr. Peterson ate 2 pies.