1. Multiplication always makes things bigger
True or false:
Multiplication always makes things bigger
What happens if you multiply by 0.5? What about if you multiply by -1? Does this make it bigger or smaller?

2. Which makes 100 biggest? ÷ 0.6 x 0.6 ÷ 0.3 x 0.3
How many 0.6’s fit into 100? What is 60% of 100?

3. 12 x 20 =
12 x 10 =
12 x 5 = 60
12 x 2.5 =
12 x 1.25 =
12 x … =
What do you notice? Which ones can you work out quickly?

4. 12 x 600 =
12 x 60 =
12 x 6 = 72
12 x 0.6 =
12 x 0.06 =
12 x … =
What should go where the dots are?

5. Can you calculate? a) 9 x 0.7 b) 0.12 x 3 c) 0.6 x 12 d) 11 x 0.4
e) 40 x 1.2
f) 26 x 0.9
Get a calculator to check your answers

6. Tell me how…
0.7 x 1.2 =
0.45 x 0.33 =

7. Decimal Products Think of two numbers between 0 and 1.
What do you get when you multiply them together?
Which pair of decimals gives you the biggest product?