Number Sense

Guess the number

100

What number comes after 9?

10

200

What number comes after 17?

18

300

What number comes before 12?

11

400

What number comes before 15?

14

500

What number comes before 19?

18

Count backwards

100

Count backwards from 6?

6, 5, 4, 3, 2, 1, 0

200

Count backwards from 10?

10-0

300

Count backwards from 13?

13-0

400

Count backwards from 17?

17-0

500

Count backwards from 25? 

25-0

find the missing number

100

3,_, 5

4

200

11,_, 13

12

300

9,_,11

10

400

14,_,16

15

500

13,_,15

14