To get the sum, put parenthesis around 1-4 and around 1-7 to indicate separate groups. Then, add the two groups.

`(1-4)+(1-7)`

Then, simplify by doing the operation inside each group.

`=-3 + (-6)`

Since the simplified form of the two groups have the same sign, to compute, add the numbers and copy the sign.

`=-9`

**Hence, the sum of 1-4 and 1-7 is -9.**

how do you calculate the sum of 1 - 4 and 1 - 7

(1 - 4) + (1 - 7)

First solve within the brackets

(-3) + (-6)

Then open the brackets (when the brackets are opened -3 will be written as it is and -6 will also remain the same because when 2 different signs are multiplied the sign becomes minus)

-3 - 6

Both are then added because they both have the same sign, and sign of the bigger number is taken.

**-9 Answer.**

I suppose you add the two problems up because of the word *sum*

`(1-4) + (1-7)`

`-3 + (-5)`

`= -8`

So the sum between 1-4 and 1-7 would be **-8.**