问题
解答题
怎样简便就怎样计算.
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答案
(1)640÷16+24×5
=40+120,
=160;
(2)28×99+28
=(99+1)×28,
=100×28,
=2800;
(3)480÷[(10+6)×5]
=480÷[16×5],
=480÷80,
=6;
(125×39)×8
=125×8×39,
=1000×39,
=39000.
怎样简便就怎样计算.
|
(1)640÷16+24×5
=40+120,
=160;
(2)28×99+28
=(99+1)×28,
=100×28,
=2800;
(3)480÷[(10+6)×5]
=480÷[16×5],
=480÷80,
=6;
(125×39)×8
=125×8×39,
=1000×39,
=39000.