Transcript

SPEAKER 1:

Suppose you wanted to do 632 divided by 16? Before you start, unless you know your 16 times table, which most people don't, it can help to jot down the multiples of 16. You can work these out by adding 16 to the previous one. You'll see how to use them as we go through.

As normal, start by asking yourself, how many 16s go into 6? As 16 doesn't go into 6, you need to carry the 6 over. Now ask yourself, how many 16s are there in 63? This is where the list of multiples of 16 comes in handy.

You can see that 3 times 16 is 48, and 4 times 16 is 64. So only 3 16s go into 63, with 15 left over as 63 minus 48 is 15. So as normal, you should put the 3 above the line and carry over 15.

The next step is to ask, how many 16s in 152? The list tells you that 9 times 16 is 144, so the answer is 9, with 8 left over. So you put a 9 above the line, but you also need to carry that 8 to somewhere. Here, what you need to do is put a decimal point after the 2 in 632, and a 0 after it. This is fine to do, as 632.0 is the same number as 632. It just means 632 and 0 tenths.

That now gives you somewhere to carry the 8. Before doing any more division, you need to remember to put a decimal point above the line, then ask yourself, how many 16s in 80? And the answer from the list is 5, as 5 times 16 is 80. So 632 divided by 16 is 39.5.