Multiplication and times tables · Usually met around P2
2, 5 and 10 times tables
×5 is half of ×10.
How to do it
Method
×5 is half of ×10
6 × 5 = 60 ÷ 2 = 30
Another way
Count in 5s
6 × 5: 5, 10, 15, 20, 25, 30
In full
A whole number ×10 gets a zero on the end. ×5 is half of ×10: 6×5 → 60 halved = 30. ×2 is just doubling. These three are the easy ones, so get them to the point where you don't have to think. You can also count in 2s, 5s and 10s, or learn the tables by heart.
Worked examples
Have a go first, then open each one for the answer and the working.
Example 1
2 × 9
Show the answer and working
Answer: 2 × 9 = 18
2 × 9: ×2 is a double, 9 + 9 = 18
Example 2
10 × 7
Show the answer and working
Answer: 10 × 7 = 70
10 × 7: a whole number ×10 gets a zero on the end, 7 × 10 = 70
Example 3
8 × 10
Show the answer and working
Answer: 8 × 10 = 80
8 × 10: a whole number ×10 gets a zero on the end, 8 × 10 = 80
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