问题
解答题
下面各题怎样算简便就怎样算.
(1)1.32+0.25×1.8×4
(2)12.75÷[14.6-(1.3+8.2)]
(3)11×(8.4-5.8)-2.6
(4)7.2×0.9+0.01×7.2.
答案
(1)1.32+0.25×1.8×4,
=1.32+0.25×4×1.8,
=1.32+1.8,
=3.12,
(2)12.75÷[14.6-(1.3+8.2)],
=12.75÷[14.6-9.5],
=12.75÷5.1,
=2.5,
(3)11×(8.4-5.8)-2.6,
=11×2.6-2.6,
=(11-1)×2.6,
=26,
(4)7.2×0.9+0.01×7.2,
=7.2×(0.9+0.01),
=7.2×0.91,
=6.552.