Count forward. The first number below is 13. What number comes next? Write the numbers as you count forward.

Count Forward

13,  ___,  ___,  ___,  ___,  ___,  ___,  ___,  ___

Write the numbers as you count backward.

Count Backward

23,  ___,  ___,  ___,  ___,  ___,  ___,  ___,  ___