问题
解答题
8.4×2.5+7.18
5.81-0.25×1.6
0.8×630×0.125.
答案
(1)8.4×2.5+7.18,
=21+7.18,
=28.18;
(2)5.81-0.25×1.6,
=5.81-(0.25×4)×0.4,
=5.81-1×0.4,
=5.81-0.4,
=5.41;
(3)0.8×630×0.125,
=(0.8×0.125)×630,
=0.1×630,
=63.