问题
解答题
计算下面各题.(能简算的要简算,并写出主要的计算过程)
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答案
(1)6.7×7.3+6.7×1.7+6.7,
=6.7×(7.3+1.7+1),
=6.7×10,
=67;
(2)1.25×0.25×32,
=1.25×0.25×(4×8),
=(1.25×8)×(0.25×4),
=10×1,
=10;
(3)21.36÷0.8-12.9,
=26.7-12.9,
=13.8;
(4)25.6-25.6×0.8,
=25.6×(1-0.8),
=25.6×0.2,
=5.12;
(5)7.65×101-7.65,
=7.65×(101-1),
=7.65×100,
=765;
(6)3.73÷2.5÷4,
=3.73÷(2.5×4),
=3.73÷10,
=0.373.