递等式计算,能简便的用简便方法计算.15.5×8.2-0.720.25×0.89×44.8×1.257.65÷0.85+1.1.

发布时间:2020-08-08 02:25:45

递等式计算,能简便的用简便方法计算.
15.5×8.2-0.72
0.25×0.89×4
4.8×1.25
7.65÷0.85+1.1.

网友回答

解:(1)15.5×8.2-0.72
=127.1-0.72
=126.38;
(2)0.25×0.89×4
=0.25×4×0.89
=0.89;
(3)4.8×1.25
=1.2×(4×1.25)
=1.2×5
=6;
(4)7.65÷0.85+1.1
=9+1.1
=10.1;
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