问题 解答题
计算下面各题,怎样简便怎样算.
0.85×201

0.5×4.85×8

2.5×48-48
2.7+4.29+2.71+6.31.2×3.5+8.8×3.5.
答案

(1)0.85×201,

=0.85×200+0.85×1,

=170+0.85,

=170.85;

(2)0.5×4.85×8,

=0.5×8×4.85,

=4×4.85,

=19.4;

(3)2.5×48-48,

=(2.5×4)×12-48,

=10×12-48,

=120-48,

=72;

(4)2.7+4.29+2.71+6.3,

=(2.7+6.3)+(4.29+2.71).

=9+7,

=16;

(5)1.2×3.5+8.8×3.5,

=(1.2+8.8)×3.5,

=10×3.5,

=35.

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