问题
解答题
计算下面各题
63×1.25×0.83.5×2.5-0.5×3.515.8÷2.5÷47.65-0.65×4.
答案
(1)63×1.25×0.8,
=63×(1.25×0.8),
=63×1,
=63;
(2)3.5×2.5-0.5×3.5,
=3.5×(2.5-0.5),
=3.5×2,
=7;
(3)15.8÷2.5÷4,
=15.8÷(2.5×4),
=15.8÷10,
=1.58;
(4)7.65-0.65×4,
=7.65-2.6,
=5.05.