3 times the sum of a number and 2

Step by step

The question

Question: write with math signs: 3 times the sum of a number and 2.

1 Change words to math

2 Put it in order

The sum is one amount, so it goes in brackets.

3 × (n + 2) is written 3(n + 2): the number goes in front, with no × sign.

So we get 3(n + 2).

3 Check

Let's check with a number.

Say the number is 10.

3 times the sum of 10 and 2 is 36.

And 3(10 + 2) is 36 too.

So 3(n + 2) is right!

Let's look back.

First: change words to math.

Then: put it in order.

Last: check.