Suppose you were asked to multiply 25 and 63. If you’re like most people, you’d probably reach for a calculator. But if you couldn’t find one, you’d probably use the standard algorithm ... example, ...

For example, 34 has 3 tens and 4 units, or we could say 34 has 3 tens and 4 ones. Write 18 out with place value labels. To multiply 18 by 100, move each digit two places to the left. Image caption ...

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 ...