问题 解答题
怎样简便就怎样计算
(1)58×72+28×58(2)3000÷125÷8(3)486-137-63
(4)432÷54+17×54(5)99×78+78(6)125×24.
答案

(1)58×72+28×58,

=(72+28)×58,

=100×58,

=5800;

(2)3000÷125÷8,

=3000÷(125×8),

=3000÷1000,

=3;

(3)486-137-63,

=486-(137+63),

=486-200,

=286;

(4)432÷54+17×54,

=8+918,

=926;

(5)99×78+78,

=(99+1)×78,

=100×78,

=7800;

(6)125×24,

=125×(8×3),

=(125×8)×3,

=1000×3,

=3000.

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