mental math
hard math
4th grade math
kindergarten math
3rd grade math
100

50+50

100

100

18x15

270

100

9x5

45

100

1+1

2

100

4x4

16

200

25+25

50

200

28x15

420

200

6x6

36

200

2+2

4

200

5x5

25

300
17+63

80

300

30x17

510

300

8x8

64

300

3+3

6

300

5x3

15

400

43+57

100

400

42x13

546

400

9x8

72

400

4+4

8

400

4x3

12

500

1+1

2

500

27x16

432

500

9x9

81

500

5+5

10

500

7x7

49

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