How do you simplify the expression #7.84 + 0.064#?
Simply add the decimals together. But before that, turn 7.84 which only has 2 decimal places to a 3 decimal place number, like 0.064, by adding the number zero, so the equation will be this.
But you can add a hyphen on the 3rd decimal place of 7.84 if you're doing it like this:
Add them together and you have your final answer.