Mental Math

01

(1)

48 + 135=

(2)

1200–1455=1202 – ?

(3)

9 X 7=

(4)

57 – 32=

(5)

122 ÷ 4=

(6)

16 X 15 =

(7)

9 X 6 X 5=

(8)

32 X 25 =

(9)

34 =

(10) Estimate

33% of $25.62

endReturn to Beginning

solutions

(1) 48 + 135=Think

50 + 133=183

(2)

1200–1455=1202 – ? Think

1200 + 2 = 1202

1455 + 2 = 1457

(3) 9 X 7=Think

Answer must be in the 60’sDigits must add to 9Answer: 63

(4)

57 – 32=Think

55 – 30= 25

(5)

122 ÷ 4=Think

122 ÷ 2 ÷ 2 61 ÷ 2 = 30.5

(6)

16 X 15 =Think

8 X 30 =240

(7)

9 X 6 X 5=Think

9 X 30=270

(8)

32 X 25 =Think

8 X 4 X 25 =800

(9) 34 =Think

3x3x3x3= 9 x 9 = 81

(10) Estimate

33% of $25.62Think

1/3 of $27=$9