From a few fragments out of a collection of 23-century-old bamboo strips, historians have pieced together what they say is the world's oldest example of a multiplication table in base 10.

How It Works It looks a lot like a modern multiplication table. The top row and the far-right column contain the same 19 numbers: 0.5, the integers 1 through 9, and multiples of 10 from 10 to 90.

Multiplication is working out how many ... it jumps one place to the right in the place value chart, because you are making it 10 times smaller. When you divide a number by 100, it jumps two ...

Find out what multiples are and how to sort multiples of 2 and 5. Doubling numbers Learn how to make doubles using ten frames, addition and multiplication. Counting in twos, threes, fives and tens ...