addition
subtraction
multiplication
divison
100

what is 16 + 15

21

100

what is 7 - 2

5

100

what is 6 x 9

54

100

what is 144 divided by 12 

12

200

what is -5 + 2

-3

200

what is 90 - 45

45

200

what is 2 times 15

30

200

what is 16 divided by 8

2

300

what is 5 + 16.5

21.5

300

what is 19.25 - 18

1.25

300

what is 5.25 x 4

21

300

what is 20 divided by -5

-4

400

what is 17.5 + 13.25

31

400

what is -6 - 7

-13

400

what is 0.11 x 300

33

400

what is -3 divided by -10

0.3

500

what is -7 + (-9) + 10

-6

500

what is -10 -(-19

9

500

what is 5 x -5 x -4

100

500

what is 100 divided by 10 divided by -5

-2