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100

- 2 x - 3 =

6

100

5/8 + 1/8 =

3/8

100

- 5 x 3 = 

- 15

100

-1 -1 = 

- 2

100

-9 - 1 = 

- 10

200

- 10 x 2 =

- 20

200

- 1 + 8 =

7

200

- 25 ÷ - 5 = 

5

200

- 12 + 6 =

- 6

200

- 4 x - 4 = 

16

300

− 27 ÷ − 3 =

9

300

7/8 - 5/7 =

9/56

300

2/3 + 1/4 =

11/12

300

- 4 + 6 = 

2

300

3/4 + 1/5 =

19/20

400

2 ( a + b ) =

2a + 2b

400

a ( b + c ) =

ab + ac

400

2 x -12 =

- 24

400

2 ( m - 3 ) = 

2m - 6

400

- 6 x - 5 =

30

500

2 ( 3 + 6 ) = 

6 + 12 = 18

500

2x + 2 - 3x =

- x + 2

500

4 ( x + y ) = 

4x + 4y

500

- 3 - 6 =

- 9

500

5/6 - 2/15 =

7/10