Addition +
Addition +
Mystery
Subtraction -
100

six + two

8

100

thirteen + five = 

18

100

twelve divided by two = 

six
6

100

six minus zero

6

200

seven + three =

10

200

four + sixteen

20

200

two times five = 

ten
10

200

seven minus three

4

300

six + six

12

300

nine plus nine

18

300

thirteen plus seven =

twenty

20

300

ten minus six

4

400

five + four =

9

400

seven plus eight

15

400

ten minus eight = 

two
2

400

twenty minus thirteen

7

500

eight + three = 

11

500

six plus thirteen

19

500

three plus five = 

Eight
8

500

seventeen minus five

12