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Addition
Subtraction
Add/Sub
Multiplication
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5

Mental Math 

5+5+5+8

23

5

MENTAL MATH

5-1

4

5

MENTAL MATH 

5+245-30

220

5

MENTAL MATH 

2 x 4

8

5

MENTAL MATH 

63/7

9

10

Mental Math 

50+50+10

110

10

MENTAL MATH

60-10

50

10

MENTAL MATH 

98+4-16

86

10

MENTAL MATH 

9 x 5

45

10

MENTAL MATH 

40/5=

8

15

Mental Math

100+900+30+29

1059

15

MENTAL MATH

81-17=

64

15

MENTAL MATH 

37+63-54-42

4

15

MENTAL MATH 

13 x 3

39

15

MENTAL MATH 

54/6

9

20

Mental Math 

104+238

342

20

MENTAL MATH

250-150-6

94

20

MENTAL MATH 

5-4+32-12+8-4

25

20

MENTAL MATH 

18 x 15

270

20

MENTAL MATH 

140/20

7

25

Mental Math 

805+49=

854

25

MENTAL MATH 

1311-235=

1076
25

MENTAL MATH 

10+15-3-1+21+37-25-6

48

25

MENTAL MATH 

5 x 3 x 9

135

25

MENTAL MATH 

165/5=

33