Addition/加法
Subtraction/减法
Multiplication/乘法
Division/除法
100

67+21

98

100

68-33

35

100

5x9

45

100

35÷5

7

200

25+47

72

200

92-47

45

200

8x14

112

200

144÷24

6

300
246+357

603

300

358-179

179

300
2(4x6)
96
300

(6÷72)÷4

3

400

9+27+532

568

400

777-51-192

340

400

4(3x3x3)

108

400

(144÷3÷3)÷2

8

500

123+345+678

1257

500

929-76-444

409

500

(3x4)(2x3x4)

288

500

(360÷4÷5)÷3

6

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