题目内容
脱式计算.
972÷(72-54)
(235+647)÷63
630+720÷36.
972÷(72-54)
(235+647)÷63
630+720÷36.
(1)972÷(72-54)
=972÷18
=54;
(2)(235+647)÷63
=882÷63
=14;
(3)630+720÷36
=630+20
=650.
=972÷18
=54;
(2)(235+647)÷63
=882÷63
=14;
(3)630+720÷36
=630+20
=650.
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