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artcher [175]
1 year ago
14

4. What is 54 + (-78) - (-39)

Mathematics
1 answer:
inysia [295]1 year ago
5 0

Answer:

Step-by-step explanation:

follow the Pemdas order of operations

add and subtract (left to right)

apply the rule +(-a)=-a

+(-78)=-78

=54-78-(-39)

54-78=-24

=-24-(-39)

apply the rule -(-a)=+a

-(-39) =+39

=-24 +39

-24+39=15

=15

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