问题 解答题

脱式计算.

972÷(72-54)

(235+647)÷63

630+720÷36.

答案

(1)972÷(72-54)

=972÷18

=54;

(2)(235+647)÷63

=882÷63

=14;

(3)630+720÷36

=630+20

=650.

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