Question

write an expression for the calculation double 5 and then multiply by 3

Answer 1

double 5 and then multiply by 3

double 5

⇒ to double a number is to have 2 of the same number added together

⇒ (5 + 5) or we can write it as (2 x 5)

multiply by 3

⇒ to have 3 times the number

⇒ 3(5 + 5) or 3(2 x 5)

Therefore the expression is 3( 5 + 5)

Answer 2

The expression for the above calculation can be written as the following.

For double 5, we have to double a number, which is similar and added together.

Now, we will get (5 + 5). For multiply by 3, we need to have 3 times the number.

This means 3(5 + 5). Thus, the expression will be 3 (5 + 5).