问题
解答题
用简便方法计算下面各题.
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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.