问题
解答题
简便运算
(1)4.38-2.85+3.62-5.15
(2)0.25×1.9×0.5×4.
答案
(1)4.38-2.85+3.62-5.15,
=4.38+3.62-(2.85+5.15),
=8-8,
=0;
(2)0.25×1.9×0.5×4,
=(0.25×4)×(1.9×0.5),
=1×0.95,
=0.95.
简便运算
(1)4.38-2.85+3.62-5.15
(2)0.25×1.9×0.5×4.
(1)4.38-2.85+3.62-5.15,
=4.38+3.62-(2.85+5.15),
=8-8,
=0;
(2)0.25×1.9×0.5×4,
=(0.25×4)×(1.9×0.5),
=1×0.95,
=0.95.