计算下面各题,能简算的要简算. 6.12÷8.5-0.58= 2.8×0.5+0.5×27.

计算下面各题,能简算的要简算. 6.12÷8.5-0.58= 2.8×0.5+0.5×27.3= 0.25×39+0.25= 0.75×1.8÷0.15=

(1)6.12÷8.5-0.58,
=0.72-0.58,
=0.14;

(2)2.8×0.5+0.5×27.3,
=(2.8+27.3)×0.5,
=30.1×0.5,
=15.05;

(3)0.25×39+0.25,
=0.25×(39+1),
=0.25×40,
=10;

(4)0.75×1.8÷0.15,
=0.75÷0.15×1.8,
=5×1.8,
=9.
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