问题 解答题
脱式计算.
720÷(200-28×5)(15+27)×(55-32)125+240÷15×1225×[(112+140)÷3].
答案

(1)720÷(200-28×5)

=720÷(200-140)

=720÷60

=12;

(2)(15+27)×(55-32)

=42×23

=966;

(3)125+240÷15×12

=125+16×12

=125+192

=317;

(4)25×[(112+140)÷3]

=25×[252÷3]

=25×84

=2100.

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