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multiply by 5
multiply by 10
100

4+3=

7

100

5-4=

1

100

5*4=

20

100

5*7=

35

100

10*6=

60

200

3+2=

5

200

9-0=

9

200

0*6=

0

200

5*1=

5

200

10*3=

30

300

7+7=

14

300

17-10

7

300

9*1=

9

300

5*2=

10

300

10*9=

90

400

8+9=

17

400

9-9=

0

400

5*6=

30

400

5*12=

60

400

10*7=

70

500

5+6=

11

500

8-5=

3

500

10*11=

110

500

5*8=

40

500

10*4=

40