Find the sum or difference. 1 1 34 1-5 a. -122 + 42 b. -0.35 - (-0.25)

11341-5=11336

-122+42=-80, when you have different signs always keep in mind that you have to subtract and then get the sign of the big number.

for the third one you firstly have to work with the two negative signs,you have to multiply them, take note that when you multiply a negative by a negative you get a positive, a positive by a positive you get a positive and a negative by a positive you get a negative.

-0.35-(-0.25)

-0.35+0.25

=-0.1

I hope this helps

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sorry if this isnt what you're looking for i dont really understand the question

which expression represents the approximate length of bc?

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