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There are a ton of i-Ready answer keys that you will be able to find on the internet. These followings are the i-Ready answer keys for Grade 1 Mathematics Teacher At-Home Activity Packet. Apparently, this packet includes 22 sets of practice problems that align to important math concepts that have likely been taught this year. 1. 7 + 1 = 8
2. 8 + 2 = 10
3. 7 + 2 = 9
4. 6 + 3 = 9

Discuss It

Did you always start at 1 when you counted? Explain.

Sample answer: No. I started with the first number of blocks and then counted on form that number.

Using Doubles and Near Doubles

Use what you know about doubles to solve.

1. 1 black sticker. 2 white stickers. How many stickers in all?

1 + 2 = 3 stickers

1. 3 white stickers. 3 black stickers. How many stickers in all?

3 + 3 = 6 stickers

1. 4 black stickers. 4 white stickers. How many stickers in all?

4 + 4 = 8 stickers

1. 4 black squares. 5 white squares. How many squares in all?

4 + 5 = 9 squares

Discuss It

How is 3 + 3 like 3 + 4? How is it different?

Answers will vary. Possible answer: 3 + 3 is a doubles fact and 3 + 4 is more.

Adding in Any Order with Near Doubles

Use the blocks. Complete the addition equations.

1. 5 + 1 = 6

1 + 5 = 6

1. 6 + 0 = 6

0 + 6 = 6

1. 5 + 2 = 7

2 + 5 = 7

1. 3 + 4 = 7

4 + 3 = 7

1. 1 + 7 = 8

7 + 1 = 8

1. 6 + 2 = 8

2 + 6 = 8

1. 5 + 4 = 9

4 + 5 = 9

1. 3 + 6 = 9

6 + 3 = 9

Fill in the number bonds to make a ten.

1. Fill 9 + 3.

10 + 2 = 12

9 + 3 = 12

1. Find 9 + 5.

10 + 4 = 14

9 + 5 = 14

1. Find 8 + 4.

10 + 2 = 12

8 + 4 = 12

1. Find 8 + 6.

10 + 4 = 14

8 + 6 = 14

1. Find 7 + 5

10 + 2 = 12

7 + 5 = 12

1. Find 7 + 6.

10 + 3 = 13

7 + 6 = 13

1. Find 7 + 4.

10 + 1 = 11

7 + 4 = 11

Discuss It

Answers will vary. Possible answer: Adding two numbers is easier when one of the numbers is ten.

1. Find 6 – 5.

5 + 1 = 6

6 – 5 = 1

1. Find 7 – 6

6 + 1 = 7

7 – 6 = 1

1. Find 5 – 2.

2 + 3 = 5

5 – 2 = 3

1. Find 6 – 4

4 – 2 = 6

6 – 4 = 2

1. Find 8 – 4.

4 + 4 = 8

8 – 4 = 4

1. Find 9 – 7.

7 + 2 = 9

9 – 7 = 2

1. Write an addition equation that helps you find 6 – 3. Then complete the subtraction equation.

3 + 3 = 6

6 – 3 = 3

Discuss It

Counting On to Subtract

1. Find 6 – 4

4 + 2 = 6

6 – 4 = 2

1. Find 7 – 3.

3 + 4 = 7

7 – 3 = 4

1. Find 8 – 6.

6 + 2 = 8

8 – 6 = 2

1. Find 9 – 8.

8 + 1 = 9

9 – 8 = 1

1. Find 6 – 5.

5 + 1 = 6

6 – 5 = 1

1. Find 9 – 4.

4 + 5 = 9

9 – 4 = 5

1. Find 8 – 2.

2 + 6 = 8

8 – 2 = 6

Discuss It

How is solving 6 – 4 the same as solving 9 – 4? How is it different?

I start at the number 4 for both problems. For problem 6 – 4, I count on to 6. For 9 – 4, I count on to 9.

Making a Ten to Subtract

1. Find 15 – 7.

15 – 5 = 10

10 – 2 = 8

15 – 7 = 8

1. Find 13 – 6.

13 – 3 = 10

10 – 3 = 7

13 – 6 = 7

1. Find 15 – 9.

15 – 5 = 10

10 – 4 = 6

15 – 9 = 6

1. Find 12 – 7.

12 – 2 = 10

10 – 5 = 5

12 – 7 = 5

1. Find 11 – 7.

11 – 1 = 10

10 – 6 = 4

11 – 7 = 4

1. Find 16 – 9.

16 – 6 = 10

10 – 3 = 7

16 – 9 = 7

Number Partners for 10

Draw counters to make 10. Then complete the equation.

10 = 9 + 1

10 = 1 + 9

10 = 8 + 2

10 = 2 + 8

10 = 6 + 4

10 = 4 + 6

10 = 5 + 5