Counting On
Doubles Facts
Doubles Facts Plus 1
Using Math Strategies to Add Three Numbers
Making 10 to Add 9
100

How would you use counting on to solve 5 + 13?

Start at 5 and add 3: 5 +1 +1 +1 = 8

100
What is the Doubles Fact for 4?
2 + 2
100

Double Jeopardy!

How would you use Doubles Plus 1 to solve 2 + 3?

2 + 2 = 4 4 + 1 = 5

100

What strategy could you use to solve this problem? 2+ 2 + 5

Doubles Facts: 2 + 2 =4 Counting on from 5 to add 4: 5 + 1 + 1 + 1 + 1 = 9

100

How can Making 10  help you solve this problem? 9 + 3

Take 1 from the 3 to add to the 9 to make 10. Now the problem reads 10 + 2 10 + 2 = 12

200

How would you use counting on to solve 18 + 3?

Start at 8 and add 3: 8 + 1 + 1 + 1 = 11

200
What is the Doubles Fact for 6?
3 + 3
200

Double Jeopardy 

How would you use Doubles Plus 1 to solve 3 + 4?

3 + 3 = 6 6 + 1 = 7

200

What strategy could you use to solve this problem? 3+ 2 + 4

Doubles Plus 1: 2 + 2 = 4 Plus 1 = 5 To add 5 + 4, use Doubles Plus 1: 4 + 4 = 8 Plus 1 = 9

200

How can Making 10 help you solve this problem? 9 + 4

Take 1 from the 4 to add to the 9 to make 10. Now the problem reads 10 + 3 10 + 3 = 13

300

How would you use counting on to solve 5 + 19?

Start at 9 and add 5: 9 + 1 + 1 + 1 + 1 +1 = 14

300
What is the Doubles Fact for 8?
4 + 4
300

Double Jeopardy 

How would you use Doubles Plus 1 to solve 5 + 4?

4 + 4 = 8 8 + 1 = 9

300

What strategy could you use to solve this problem? 4+ 6 + 5

Ways to Make Ten: 6 + 4 = 10 Counting on: 10 + 5 = 15

300

How can Making 10 help you solve this problem? 9 + 6

Take 1 from the 6 to add to the 9 to make 10. Now the problem reads 10 + 5 10 + 5 = 15

400

How would you use counting on to solve 6 + 11?

Start with 11 and add 6: 11 + 1 + 1 + 1 + 1 + 1 + 1 = 17

400
What is the Doubles Fact for 12?
6 + 6
400

Double Jeopardy

How would you use Doubles Plus 1 to solve 6 +7?

6 + 6 = 12 12 +1 = 13

400

What strategy could you use to solve this problem? 6+ 6 + 3

Doubles Facts: 6 + 6 = 12 Counting on: 12 + 1 + 1 + 1 = 15

400

How can Making 10 help you solve this problem? 9 +7

What is Take 1 from the 7 to add to the 9 to make 10. Now the problem reads 10 + 6 10 + 6 = 16

500
How would you use counting on to solve 14 + 3?
Start at 14 and add 3: 14 +1 +1 +1 = 17!
500
What is the Doubles Fact for 14?
7 + 7
500

Double Jeopardy

How would you use Doubles Plus 1 to solve 7 + 8?

7 + 7 = 14 14 + 1 = 15

500

What strategy could you use to solve this problem? 7+ 3 + 7

Doubles Facts: 7 + 7 = 14 Counting on: 14 + 1 + 1 + 1 = 17 OR Ways to Make Ten: 7 + 3 = 10 Counting on: 10 + 1 + 1 + 1 + 1 + 1 + 1 + 1 = 17

500

How can Making 10 help you solve this problem? 9 +8

What is Take 1 from the 8 to add to the 9 to make 10. Now the problem reads 10 + 7 10 + 7 = 17

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