Using Times Tables
Maths: Year 3 & 4 National Curriculum, topic 1.3.2
Using Times Tables to Multiply or Divide Numbers
We can use the 3, 4 and 8 times tables to divide and multiply numbers.
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Using times tables
- We know from our 8 times tables that 3 x 8 = 24.
- So that means 24 ÷ 3 = 8.
- That also means 24 ÷ 8 = 3.
- The division facts match the multiplication fact that we used.
Multiplying ten times bigger
- Next, we can look at the number being ten times bigger.
- Again, if I know 3 x 8 = 24 then I know:
- 30 x 8 = 240
- 3 x 80 = 240
- 30 x 80 = 2400
Dividing ten times bigger
- Because we know how to multiply when the numbers ten or a hundred times bigger, we also know how to divide too!
- 240 ÷ 8 = 30
- 240 ÷ 3 = 80
- 240 ÷ 80 = 3
- 240 ÷ 30 = 8
Test yourself on Using Times Tables
From our 4 times tables, we know that 4 x 9 = 36.
Using this knowledge, what is 4 x 90?
From our 3 times tables, we know that 3 x 7 = 21.
Using this knowledge, what is 210 ÷ 70?
From our 3 times tables, we know that 8 x 8 = 64.
Using this knowledge, what is 6400 ÷ 80?