Addition Facts +3 Worksheet for 8-Year-Olds | Math Practice

Instructions

1. Read each problem carefully.
2. Add 3 to the number in each problem.
3. Show your thinking with a drawing, number line, or quick mental math when helpful.
4. Complete the easy sections first, then try the challenge questions.

Remember: Adding 3 means counting forward three numbers.

Example: 6 + 3 = 9 because 7, 8, 9 are three numbers after 6.

1. Add 3

Solve each addition fact.

1. 0 + 3 = __
2. 1 + 3 = __
3. 2 + 3 = __
4. 3 + 3 = __
5. 4 + 3 = __
6. 5 + 3 = __
7. 6 + 3 = __
8. 7 + 3 = __
9. 8 + 3 = __
10. 9 + 3 = __

2. Complete the Fact Table

Use the example to help you. Fill in the missing answers.

3. Find the Missing Number

Write the missing number in each equation.

1. 3 + __ = 6
2. 4 + __ = 7
3. 8 + __ = 11
4. 10 + __ = 13
5. 15 + __ = 18
6. 17 + __ = 20

4. Circle the Correct Answer

Circle the number that makes each equation true.

1. 6 + 3 = 8 9 10
2. 9 + 3 = 11 12 13
3. 12 + 3 = 14 15 16
4. 16 + 3 = 18 19 20
5. 19 + 3 = 21 22 23

5. Math Stories

Write an addition equation and solve each problem.

1. Maya has 7 stickers. Her friend gives her 3 more. How many stickers does Maya have now?

Equation: __

Answer: __ stickers

2. A basket has 11 apples. Dad adds 3 more apples. How many apples are in the basket?

Equation: __

Answer: __ apples

3. Leo builds a tower with 14 blocks. He adds 3 more blocks. How many blocks are in his tower?

Equation: __

Answer: __ blocks

6. Make Your Own +3 Facts

Choose any starting number. Write an addition fact that adds 3, then solve it.

7. Draw It!

Show 8 + 3 using dots, pictures, or a number line. Then write the answer.

Drawing or number line:

8 + 3 = __

Optional Challenge

1. Which number is 3 more than 18? __

2. Sam says, “21 + 3 = 23.” Is Sam correct? Explain how you know.

3. Find two different addition facts that have an answer of 15 and use 3 as one addend.

__ and __

Answer Key

1. Add 3

1. 3
2. 4
3. 5
4. 6
5. 7
6. 8
7. 9
8. 10
9. 11
10. 12

2. Complete the Fact Table

• 10 + 3 = 13
• 11 + 3 = 14
• 12 + 3 = 15
• 13 + 3 = 16
• 14 + 3 = 17

3. Find the Missing Number

1. 3
2. 3
3. 3
4. 3
5. 3
6. 3

4. Circle the Correct Answer

1. 9
2. 12
3. 15
4. 19
5. 22

5. Math Stories

1. 7 + 3 = 10 stickers
2. 11 + 3 = 14 apples
3. 14 + 3 = 17 blocks

6. Make Your Own +3 Facts

Answers will vary. Each answer must be 3 more than the starting number.

7. Draw It!

8 + 3 = 11

Optional Challenge

1. 21
2. No. 21 + 3 = 24. Counting forward three numbers from 21 gives 22, 23, 24.
3. 12 + 3 = 15. The same fact may also be written as 3 + 12 = 15.