Math

Mental Math心理数学

100

2+8

10

200

26+14

40

300

17-6

11

400

28-19

9

500

87+24

111

Add/Subtract加减法

100

12-8

4

200

24+3

27

300

85-14

71

400

91+13

104

500

160-58

102

BEDMAS (Order of Operations)行动命令

100

2x4+3

11

200

16-2x3

10

300

20+5x5

45

400

7x2-5

9

500

6x4+2x2

28

Multiply/Divide乘法和除法

100

5x9

45

200

12÷ 3

4

300

8x7

56

400

48÷ 6

8

500

24x5

120

Fractions分数

100

Reduce 减少 3/6

1/2

200

 Name an equivalent fraction for 将等效分数命名为 1/4

2/8, 3/12, 4/16, 5/20, 6/36

300

Which fraction is greater? 哪个分数更大？3/4 or 7/8

3/4

400

Is 2²/₃ greater than, less than, or equal to 2⁷/₈? 2²/₃是否大于、小于或等于2⁷/₈?

less than 2⁷/₈

500

What is 1/5 as a percent AND decimal? 占百分比和小数的1/5是多少?

20% 0.5