What is Multiplicative Thinking?
Basically, it is all about competence with multiplication. The Victorian Government seems to be promoting the idea.
Here are some problems I have put onto cards to be used in a “Quiz Quiz Trade” situation.
19 x 6 = (Hint: do 20 x 6 = 120)
101 x 5 = (Hint: Do 100 x 5 first, then add another 5)
79 x 9 = (Hint: Do 8x 9 =, then make that 80 x 9 =, then take off 9)
14 x 5 = (Hint: Do 7 x 5 =, then double your answer)
13 x 8 = (Hint: Do 10 x 8, then add 3 x 8)
101 x 6 = (Hint: Do 100 x 6, then add 6)
17 x 4 = (Hint: Do10 x 4, then add 7×4)
19 x 3 = (Hint: Do 20 x 3, then take away 1×3)
21 x 3 = (Hint: Do 20 x 3, then add 1 x 3 )
22 x 6 = (Hint: Do11 x 6 and then double it. Or do 20 x 6 and then add 2 x 6)
19 x 5 = (Hint: Do 20 x 5 and then take away 1 x 5)
19 x 6 = (Hint: Do 20 x 6 and then take away 1 x 6)
19 x 7 = (Hint: Do 20 x 7 and then take away 1 x 7)
101 x 6 = (Hint: Do 100 x 6 and then add 1 x 6)
79 x 4 = (Hint: Do 8 x 4, then add a 0 to make it 80 x 4. Now take away 4.)
79 x 5 = (Hint: Do 8 x 5, then add a 0 to make it 80 x 5. Now take away 5.)
18 x 9 = (Hint: Do 9 x 9 =, and then double your answer)
18 x 6 = (Hint: Make it half of 18 to do the sum, then double your answer.)
79 x 2 = (Hint: Do 8 x 2, then add a 0 to make it 80 x 2. Now take away 2.)
14 x 4 = (Hint: Do 7 x 4, then double your answer.)