decompose numbers

decompose number 8

• 3 + 4

• 4+2

• 5+3

• 2+9

decompose number 13

• 10 + 11

• 3 + 12

• 4 + 7

• 9 + 4

decompose number 9

• 3 + 3

• 6 + 3

• 6 + 2

• 9 + 1

Decompose number 7

• 2+5

• 5+3

• 2+6

• 8+7

Decompose number 12

• 10 + 3

• 10 + 5

• 10 + 6

• 10 + 2

Decompose number 5

• 2 + 3

• 2 + 2

• 4+8

• 5+5

decompose number 4

• 2+1

• 2+2

• 3+5

• 1+2

decompose number 9

• 10+1

• 5+7

• 7+2

• 8+2

decompose number 8

• 4+2

• 6+2

• 3+2

• 9+8

Which can you use to show double known fact strategy?

• 6+6

• 2+9

• 4+1

• 8+1