Question

How do you subtract `\frac { 3} { 10} - ( - \frac { 7} { 3} )`?

Answer 1

Since there are 2 `-` signs, they cancel out: `=3/10+7/3`

Explanation:

We now get the same denominator, by multiplying both fractions with a 'disguised' `1`:

`=3/10xx3/3+7/3xx10/10=(3xx3)/(10xx3)+(7xx10)/(3xx10)`

`=9/30+70/30=79/30=2 19/30`