计算:
①10.1×8
②0.25×0.08×4
③2.65×3.7+1.35×3.7
④9.9×108.
网友回答
解:①10.1×8,
=(10+0.1)×8,
=80+0.8,
=80.8;
②0.25×0.08×4,
=(0.25×4)×0.08,
=1×0.08,
=0.08;
③2.65×3.7+1.35×3.7,
=3.7×(2.65+1.35),
=3.7×4,
=14.8;
④9.9×108,
=(10-0.1)×108,
=1080-10.8,
=1069.2;
解析分析:①②③④运用乘法的分配律进行计算,使计算更加简便.
点评:本题运用乘法的分配律进行计算,考查了学生的计算能力.