Question

How do you simplify `-2.7times 3.9`?

Answer 1

You can multiply by `10` twice to scale both decimals, then divide your answer by `10` twice to reverse it.

`color(blue)(-2.7xx3.9)`

`= 1/100(-27xx39)`

`= 1/100(-30xx39 - (-3 xx 39))`

`= 1/100(-1170 - (-117))`

`= 1/100(-1170 + 117)`

`= 1/100(-1053)`

`= color(blue)(-10.53)`