Practice with the help of **Spectrum Math Grade 1 Answer Key Chapter 1 Lesson 1.17**** Fact Families 7 Through 10** regularly and improve your accuracy in solving questions.

## Spectrum Math Grade 1 Chapter 1 Lesson 1.17 Fact Families 7 Through 10 Answers Key

**Add or Subtract.**

**1.**

Answer:

Explanation:

Addition:

4 + 5 = 9.

Adding 4 and 5, we get the sum 9.

5 + 4 = 9.

Adding 5 and 4, we get the sum 9.

9 – 4 = 5.

Subtraction of 9 and 4, we get the difference 5.

9 – 5 = 4.

Subtraction of 9 and 5, we get the difference 4.

**2.**

Answer:

Explanation:

Addition:

3 + 7 = 10.

Adding 3 and 7, we get the sum 10.

7 + 3 = 10.

Adding 7 and 3, we get the sum 10.

10 – 3 = 7.

Subtraction of 10 and 3, we get the difference 7.

10 – 7 = 3.

Subtraction of 10 and 7, we get the difference 3.

**3.**

Answer:

Explanation:

Addition:

5 + 2 = 7.

Adding 5 and 2, we get the sum 7.

2 + 5 = 7.

Adding 2 and 5, we get the sum 7.

7 – 5 = 2.

Subtraction of 7 and 5, we get the difference 2.

7 – 2 = 5.

Subtraction of 7 and 2, we get the difference 5.

**4.**

Answer:

Explanation:

Addition:

6 + 3 = 9.

Adding 6 and 3, we get the sum 9.

3 + 6 = 9.

Adding 3 and 6, we get the sum 9.

9 – 6 = 3.

Subtraction of 9 and 6, we get the difference 3.

9 – 3 = 6.

Subtraction of 9 and 3, we get the difference 6.

**5.**

Answer:

Explanation:

1 + 7 = 8.

Adding 1 and 7, we get the sum 8.

7 + 1 = 8.

Adding 7 and 1, we get the sum 8.

8 – 1 = 7.

Subtraction of 8 and 1, we get the difference 7.

8 – 7 = 1.

Subtraction of 8 and 7, we get the difference 1.

**6.**

Answer:

Explanation:

Addition:

5 + 5 = 10.

Adding 5 and 5, we get the sum 10.

10 – 5 = 5.

Subtraction of 10 and 5, we get the difference 5.

**7.**

Answer:

Explanation:

4 + 3 = 7.

Adding 4 and 3, we get the sum 7.

3 + 4 = 7.

Adding 3 and 4, we get the sum 7.

7 – 4 = 3.

Subtraction of 7 and 4, we get the difference 3.

7 – 3 = 4.

Subtraction of 7 and 3, we get the difference 4.

**8.**

Answer:

Explanation:

2 + 6 = 8.

Adding 4 and 5, we get the sum 8.

6 + 2 = 8.

Adding 6 and 2, we get the sum 8.

8 – 2 = 6.

Subtraction of 8 and 2, we get the difference 6.

8 – 6 = 2.

Subtraction of 8 and 6, we get the difference 2.

**Add or Subtract.**

**9.**

Answer:

Explanation:

4 + 6 = 10.

Adding 4 and 6, we get the sum 10.

6 + 4 = 10.

Adding 6 and 4, we get the sum 10.

10 – 6 = 4.

Subtraction of 10 and 6, we get the difference 4.

10 – 4 = 6.

Subtraction of 10 and 4, we get the difference 6.

**10.**

Answer:

Explanation:

4 + 4 = 8.

Adding 4 and 4, we get the sum 8.

8 – 4 = 4.

Subtraction of 8 and 4, we get the difference 4.

**11.**

Answer:

Explanation:

2 + 7 = 9.

Adding 2 and 7, we get the sum 9.

7 + 2 = 9.

Adding 7 and 2, we get the sum 9.

9 – 2 = 7.

Subtraction of 9 and 2, we get the difference 7.

9 – 7 = 2.

Subtraction of 9 and 7, we get the difference 2.

**12.**

Answer:

Explanation:

8 + 2 = 10.

Adding 8 and 2, we get the sum 10.

2 + 8 = 10.

Adding 2 and 8, we get the sum 10.

10 – 2 = 8.

Subtraction of 10 and 2, we get the difference 8.

10 – 8 = 2.

Subtraction of 10 and 8, we get the difference 2.

**13.**

Answer:

Explanation:

5 + 3 = 8.

Adding 5 and 3, we get the sum 8.

3 + 5 = 8.

Adding 3 and 5, we get the sum 8.

8 – 5 = 3.

Subtraction of 8 and 5, we get the difference 3.

8 – 3 = 5.

Subtraction of 8 and 3, we get the difference 5.

**14.**

Answer:

Explanation:

1 + 6 = 7.

Adding 1 and 6, we get the sum 7.

6 + 1 = 7.

Adding 6 and 1, we get the sum 7.

7 – 1 = 6.

Subtraction of 7 and 1, we get the difference 6.

7 – 6 = 1.

Subtraction of 7 and 6, we get the difference 1.

**15.**

Answer:

Explanation:

8 + 1 = 9.

Adding 8 and 1, we get the sum 9.

1 + 8 = 9.

Adding 1 and 8, we get the sum 9.

9 – 1 = 8.

Subtraction of 9 and 1, we get the difference 8.

9 – 8 = 1.

Subtraction of 9 and 8, we get the difference 1.

**16.**

Answer:

Explanation:

7 + 0 = 7.

Adding 7 and 0, we get the sum 7.

0 + 7 = 7.

Adding 0 and 7, we get the sum 7.

7 – 0 = 7.

Subtraction of 7 and 0, we get the difference 7.

7 – 7 = 0.

Subtraction of 7 and 7, we get the difference 0