问题 解答题

递等式计算

(1)12×(124-85)÷26

(2)536-36×12+78

(3)9.8+2.02-7.6

(4)169÷13+87×11.

答案

(1)12×(124-85)÷26

=12×39÷26

=468÷26

=18;

(2)536-36×12+78

=536-432+78

=104+78

=182;

(3)9.8+2.02-7.6

=11.82-7.7

=4.12;

(4)169÷13+87×11

=13+957

=970.

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