Video: KS2-M16 • Paper 3 • Question 21

Explain how you can use this fact to find the answer to 18 × 326. 5,542 ÷ 17 = 326

02:04

Video Transcript

Explain how you can use this fact to find the answer to 18 multiplied by 326. And the fact is 5542 divided by 17 equals 326.

This is a really interesting question because it’s not asking us to find the answer to 18 multiplied by 326. Instead, it’s asking us to explain how we can do something. In other words, we need to write down a sentence that explains our method.

So first of all, let’s look at the fact that we’re given and think about how we could use it to find the answer to 18 multiplied by 326. If we know that 5542 divided by 17 equals 326, what other fact do we know?

Well, we can look at the inverse of this division fact and turn it into a multiplication fact. 17 multiplied by 326 equals 5542. So if we know what 17 lots of 326 are, how can we use this to help find what 18 lots of 326 is?

Well, we just need to add another lot of 326 to the answer. So now that we know how we’d use the fact to help, let’s write a sentence that explains this. We know that 17 lots of 326 equals 5542. So to find 18 lots of 326, we can add 326 to 5542. Remember, we don’t need to calculate the answer. This question is all about putting our thoughts and our methods into words and explaining how we would do things.

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