Show:
+10/-10
Addition
Subtraction
Multiplication
Count By 2's
100

10

0/20


100

22 + 85

107

100

67-32

35

100
4 groups of 2 

** ** ** ** 

8

100

Count up to 10 

2, 4, 6, 8, 10

200

65

55/75

200

76+ 31

107

200

88-44

44

200

6 groups of 3 

*** *** *** *** *** *** 

18

200

Count up to 16

2, 4, 6, 8, 10, 12, 14, 16

300
48

38/58

300

87 + 33

120

300

35-19

16

300

5 groups of 5

*****  *****  *****  *****  *****

25

300

Count up to 20

2, 4, 6, 8, 10, 12, 14, 16, 18, 20 

400

109

99 / 129

400

87 + 65

152

400

33-29

4

400

4 groups of 6

******   ******   ******   ******

24

400

Count by two's starting at 10 up to 30

10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30 

500

549

539 / 559

500

125 + 67

192

500

72-29

43

500

8 groups of 6

******    ******    ******    ******

******    ******    ******    ******

48

500

Count by 2's from 20 to 40

20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40