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(+345) + (654)=

(+345) + (-111)=

(-900) + (+99)=

(-678) + (230)=​

Sagot :

CANCER37GO

Answer:

SANA MAKATULONG po

Step-by-step explanation:

1.

= (+345)+(654)

= 345+654

= 999

2.

= (+345)+(-111)

= 345+-111

= 345-111

= 234

3.

= (-900)+(+99)

= -900+99

= -801

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