问题 解答题

脱式计算.

(300+180÷5)×12

600÷[30-(10+5)]

72÷[2×(105-87)].

答案

(1)(300+180÷5)×12

=(300+36)×12

=336×12

=4032;

(2)600÷[30-(10+5)]

=600÷[30-15]

=600÷15

=40;

(3)72÷[2×(105-87)]

=72÷[2×18]

=72÷36

=2.

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