Question

3. Add without using a number line:
(a) (-138) + (-122)
(b) (-269) + 169
(d) (–139) + (-456)
(e) (-278) + 278
(c) (-965) + 400

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Answer 1

Answer:

(a). -138-122 (because + × - = - and two negative terms add)

-260

(b). -269+169

-100

(d). -139-456

-595

(e). -278+278

0 (two same terms with opposite signs always give zero)

(c). -956+400

-556

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