问题
解答题
用简便方法计算下列各题
|
答案
(1)9.7×0.47+1.53×9.7,
=9.7×(0.47+1.53),
=9.7×2,
=19.4;
(2)10.1×90,
=10×90+0.1×90,
=900+9,
=909.
用简便方法计算下列各题
|
(1)9.7×0.47+1.53×9.7,
=9.7×(0.47+1.53),
=9.7×2,
=19.4;
(2)10.1×90,
=10×90+0.1×90,
=900+9,
=909.