问题
解答题
怎样简便就怎样算.
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答案
(1)4.27÷0.7×1.3,
=6.1×1.3,
=7.93;
(2)18.9-18.9÷1.4,
=18.9-13.5,
=5.4;
(3)0.25×408,
=0.25×(4×102),
=(0.25×4)×102,
=1×102,
=102;
(4)0.25×1.25×16,
=0.25×1.25×(2×8),
=(0.25×2)×(1.25×8),
=0.5×10,
=5;
(5)0.4×99+0.4,
=0.4×(99+1),
=0.4×100,
=40;
(6)12.5×1.7+8.3×12.5,
=12.5×(1.7+8.3),
=12.5×10,
=125.