MTC MTC Mental Math Strategies

Question 1

Using the doubling strategy, what is 4 × 8? (Start with 2 × 8 = 16, then double)

Accepted Answer

32

Answer

24

Answer

40

Answer

28

Question 2

Using the doubling strategy, what is 8 × 6? (Start with 4 × 6 = 24, then double)

Accepted Answer

48

Answer

42

Answer

56

Answer

40

Question 3

Using the 'multiply by 10 then halve' strategy, what is 5 × 8?

Accepted Answer

40

Answer

45

Answer

35

Answer

50

Question 4

Using the near-ten strategy, what is 9 × 7? (Use 10 × 7 first)

Accepted Answer

63

Answer

70

Answer

56

Answer

54

Question 5

Using the doubling strategy, what is 12 × 7? (Start with 6 × 7 = 42, then double)

Accepted Answer

84

Answer

77

Answer

91

Answer

72

Question 6

Using the near-ten strategy, what is 9 × 11?

Accepted Answer

99

Answer

110

Answer

88

Answer

100