Question

a, 54 + ( - 37 + 10 - 54 + 67 )

b, - 2021 + ( - 569 ) + ( - 201 ) + ( + 469 ) + 301

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Answer 1

\(\text{a, 54 + (- 37 + 10 - 54 + 67)}.\)

\(=54-37+10-54+67=\left(54+54\right)+\left(-37+67\right)+10=30+10=40.\)

\(\text{b, - 2021 + (- 569) + (- 201) + (+ 469) + 301}.\)

\(=-2021-569-201+469+301=-2021+\left(-569+469\right)+\left(-201+301\right)=-2021-100+100=-2021.\)