问题 解答题

按运算顺序计算

84-57+26

250+240÷24×5

124-172÷4

325÷5+86×3

34×(14+8)

(125-75)×12÷3

10-3.8-5.2

18.63+14.2-8.63.

答案

(1)84-57+26

=27+26

=53;

(2)250+240÷24×5

=250+10×5

=250+50

=300;

(3)124-172÷4

=124-43

=81;

(4)325÷5+86×3

=65+258

=323;

(5)34×(14+8)

=34×22

=748;

(6)(125-75)×12÷3

=50×12÷3

=600÷3

=200;

(7)10-3.8-5.2

=10-(3.8+5.2)

=10-9

=1;

(8)18.63+14.2-8.63

=18.63-8.63+14.2

=10+14.2

=24.2.

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