问题 解答题
脱式计算.
100-28+72200-28×554+783÷2740×(62-37)
答案

(1)100-28+72,

=72+72,

=144;

(2)200-28×5,

=200-140,

=60;

(3)54+783÷27,

=54+29,

=83;

(4)40×(62-37),

=40×25,

=1000.

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