Practice with the help of Spectrum Math Grade 1 Answer Key Chapter 3 Lesson 3.15 Using Addition and Subtraction regularly and improve your accuracy in solving questions.
Spectrum Math Grade 1 Chapter 3 Lesson 3.15 Using Addition and Subtraction Answers Key
Think addition for subtraction. Solve each problem.
Answer:
When seven is subtracted from twenty it gives the value 13 as shown below.
i.e. 20 -7 = 13
Answer:
Let the unknown number be x
7 + x = 20
x = 20 -7
x = 13
Therefore 7 + 13 is equal to 20.
Answer:
When seven is subtracted from Eighteen it gives the value 13 as shown below.
i.e. 18 -5 = 13
Answer:
Let the unknown number be x
5 + x = 20
x = 18 – 5
x = 13
Therefore 5 + 13 is equal to 18.
Answer:
When seven is subtracted from Nineteen it gives the value 12 as shown below.
i.e. 19 -7 = 12
Answer:
Let the unknown number be x
7 + x = 19
x = 19 – 7
x = 12
Therefore 7 + 12 is equal to 19.
Answer:
When six is subtracted from seventeen it gives the value 11 as shown below.
i.e. 17 -6 = 11
Answer:
Let the unknown number be x
6 + x = 17
x = 17 – 6
x = 11
Answer:
When four is subtracted from sixteen it gives the value 12 as shown below.
i.e. 16 – 4 = 12
Answer:
Let the unknown number be x
4 + x = 16
x = 16 – 4
x = 12
Answer:
When one is subtracted from twelve it gives the value 11 as shown below.
i.e. 12 – 1 = 11
Answer:
Let the unknown number be x
1 + x = 12
x = 12 – 1
x = 11
Answer:
When three is subtracted from fifteen it gives the value 12 as shown below.
i.e. 15 – 3 = 12
Answer:
Let the unknown number be x
3 + x = 15
x = 15 – 3
x = 12
Answer:
When three is subtracted from fifteen it gives the value 12 as shown below.
i.e. 14 – 3 = 11
Answer:
Let the unknown number be x
3 + x = 14
x = 14 – 3
x = 11
Answer:
When three is subtracted from fifteen it gives the value 12 as shown below.
i.e. 20 – 8 = 12
Answer:
Let the unknown number be x
8 + x = 20
x = 20 – 8
x = 12