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

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lemjay's profile pic

lemjay | High School Teacher | (Level 2) Senior Educator

Posted on

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.

malkaam's profile pic

malkaam | Student, Undergraduate | (Level 1) Valedictorian

Posted on

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.

amysor's profile pic

amysor | Student, Grade 10 | (Level 1) Valedictorian

Posted on

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.

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