问题 解答题
用简便方法计算下面各题.
1.8×5.46+1.8×4.540.65×2012.33×0.5×4
99×5.64.8×0.252.64+8.67+1.33-1.64.
答案

(1)1.8×5.46+1.8×4.54,

=1.8×(5.46+4.54),

=1.8×10,

=18;

(2)0.65×201,

=0.65×(200+1),

=0.65×200+0.65,

=130+0.65,

=130.65;

(3)2.33×0.5×4,

=2.33×(0.5×4),

=2.33×2,

=4.66;

(4)99×5.6,

=(100-1)×5.6,

=100×5.6-5.6,

=560-5.6,

=554.4;

(5)4.8×0.25,

=1.2×(4×0.25),

=1.2×1,

=1.2;

(6)2.64+8.67+1.33-1.64,

=(2.64-1.64)+(8.67+1.33),

=1+10,

=11.

单项选择题
单项选择题