How it works
This 10s multiplication chart shows the 10 times table from 10 × 1 = 10 to 10 × 12 = 120, and Go up to × 20 carries on to 10 × 20 = 200. Every answer is the other number with a 0 after it.
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Why a 0 lands on the end
Each place in a number is worth 10 times the place on its right, so multiplying by 10 moves every digit one place left. In 10 × 7 the 7 leaves the ones place for the tens place, and a 0 is written to hold the place it left: 70. Two digits move together: 10 × 14 = 140.
Make the quiz worth taking
Left in order, this chart can be finished by copying 1 to 12 and writing a 0 after each. Open More options and choose Mixed up under Order of the facts, and the copying stops. Go up to × 20 adds two-digit numbers, where a slip like 103 for 10 × 13 can surface.
- Say the digits move one place left, not that you add a zero: with decimals only the moving rule works.
- Reach the neighbors: 9 × 6 is 10 × 6 = 60 less one 6, and 5 × 6 is half of 60.
- A metric ruler is this chart in plastic: a centimeter is 10 millimeters, so 7 centimeters are 70 millimeters.
Questions and answers
Is every number that ends in 0 in the 10 times table?
Yes, and no other whole number is. A last digit of 0 means whole tens with no ones left over, so 4,370 is in the table: 10 × 437 = 4,370. Because 10 is two 5s, every answer here is in the 2s and the 5s too.
How does a 10s chart help with division?
Read any line from right to left: 10 × 9 = 90 also says 90 ÷ 10 = 9. To divide a number ending in 0 by 10, move its digits one place right, which drops the 0: 340 ÷ 10 = 34.
Which lines of the 10 times table are new?
For a pupil who has met the 1 to 9 tables, only 10 × 10 = 100, 10 × 11 = 110 and 10 × 12 = 120. The other 9 lines have appeared turned around in earlier tables, such as 7 × 10 = 70.