问题
解答题
计算各题,能简算的要简算.
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答案
(1)3.4×12.5×0.08,
=3.4×(12.5×0.08),
=3.4×1,
=3.4;
(2)5.4×2.8+7.2×5.4,
=5.4×(2.8+7.2),
=5.4×10,
=54;
(3)8.8÷0.4÷2,
=8.8÷(0.4×2),
=8.8÷0.8,
=11;
(4)8.7×9.9,
=8.7×(10-0.1),
=8.7×10-8.7×0.1,
=87-0.87,
=86.13.