 Multiply Three Numbers | Year 4 Maths Resources

## What you need to know

Things to remember:

• If we multiply by 1 the number stays the same!
• If we multiply by 0 the answer is always 0!

Multiplying numbers can be simple when we have 1s or 0s. If we multiply by 1 the number doesn’t change, if we multiply by 0 the answer is always 0.

What is $12\times0\times4$?

$$12\times0\times5=0\times4=0$$

TIP: Whenever there is a multiplication with a 0, the answer will always be 0!

What is $315\times217\times0$?

Try multiplying the 0 first.

$$315\times217\times0=315\times0=0$$

When we multiply by 1, our numbers stay the same!

What is [/latex]5\times1\times8[/latex]?

$$5\times1\times8=5\times8=40$$

Let’s look at some more examples:

$$1\times4\times8=4\times8=32$$

$$3\times1\times3=3\times3=9$$

$$5\times4\times1=5\times4=20$$

TIP: When there is a $\times1$, we can just ignore it!

You might also be asked a question like “What is the answer to [/latex]6\times6\times5[/latex]?” So we’ll have two multiplications to do. But you can decide on which order is easiest for you.

$$6\times6\times5=36\times5=180$$

$$6\times6\times5=6\times30=180$$

Question 1: What is $6\times0\times8$?

## Example Questions

There is a 0, so the answer has to be 0! But let’s just check

$$6\times0\times8=0\times8=0$$

$6\times0\times8=0$

One of the multiplications is a 1, so we can start by ignoring it.

$$9\times1\times4=9\times4=36$$

$9\times1\times4=36$

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