math for pre-k
math for 1grade
math for 2nd grade
math grade for 3rd
math for 4th grade
100

1+5


6


100

10-3

7

100

16+8

24

100

54-45

9

100

100+5

105

200

2+3

5

200

10-2

8


200

13+8

21

200

45-83

22

200

92-45

47

300

1+1

2

300

11+2

13

300

11+8

19

300

22+45

67

300

99-83

16

400

2+1

3

400

8+3

11

400

11+7

18

400

67-55

12

400

108-105

3

500

0+0

=0

500

8+8

16

500

18+5

23

500

83-45

38

500

75+80

155

M
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