问题
解答题
计算,能简算的要简算.
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答案
(1)0.32×2.5×12.5,
=(4×2.5)×(12.5×0.08),
=10×1,
=10;
(2)3.6×0.81+0.36×1.9,
=0.36×8.1+0.36×1.9
=0.36×(8.1+1.9),
=0.36×10,
=3.6;
(3)4.05÷[1.8×(3.36-2.86)],
=4.05÷[1.8×(3.36-2.86)],
=4.05÷[1.8×0.5],
=4.05÷0.9,
=4.5.