问题
解答题
用简便方法计算下面各题,要写出计算过程.
①1.25×0.25×32
②0.2×60.4+60.4+9.8.
答案
①1.25×0.25×32,
=1.25×0.25×4×8,
=(1.25×8)×(0.25×4),
=10×1,
=10;
②0.2×60.4+60.4+9.8,
=(0.2+9.8)×60.4,
=10×60.4,
=604.
用简便方法计算下面各题,要写出计算过程.
①1.25×0.25×32
②0.2×60.4+60.4+9.8.
①1.25×0.25×32,
=1.25×0.25×4×8,
=(1.25×8)×(0.25×4),
=10×1,
=10;
②0.2×60.4+60.4+9.8,
=(0.2+9.8)×60.4,
=10×60.4,
=604.