math

-

100

90-20

70

200

452-400

52

300

2134-2100

34

400

32-13

19

500

1-1

0

+

100

10+10

20

200

821+21

842

300

123+213

336

400

842+341

1283

500

7842+3987

11829

x

100

10x10

100

200

5x5

25

300

11x10

110

400

200x200

40000

500

1000x1000

1000000

-

100

10-5

5

200

324-24

300

300

123-121

2

400

123-118

5

500

6783-2789

3994

+

100

43+54

97

200

786+234

1020

300

543+674

1190

400

4453+4633

9086

500

43676+34553

78229