Show:
Addition within 20
Subtraction within 20
Adding Tens
Subtracting Tens
Guess the Number
100

6+3

9

100

20-10

10

100

10+10

20

100

80-30

50

100

I have 4 tens and 8 ones. What number am I?

48

200

7+7

14

200

17-10

7

200

30+20

50

200

60-20

40

200

I have 8 tens and 2 ones. What number am I?

82

300

9+6

15

300

8-5

3
300

40+40

80

300

30-10

20

300

I have 6 ones and 5 tens. What number am I?

56

400

3+5

8

400

10-6

4

400

50+40

90

400

70-30

40

400

I have 2 tens and 3 ones. What number am I? 

23

500

9+8

17

500

15-6

9

500

50+50

100

500

50-40

10

500

I have 9 ones and 5 tens. What number am I? 

59