问题
解答题
用你喜欢的方法计算下面各题.
4.32-4.32×0.9
49×0.125×8
0.67×3+0.67×97
4.9×9.9.
答案
(1)4.32-4.32×0.9,
=4.32×(1-0.9),
=4.32×0.1,
=0.432;
(2)49×0.125×8,
=49×(0.125×8),
=49×1,
=49;
(3)0.67×3+0.67×97,
=0.67×(3+97),
=0.67×100,
=67;
(4)4.9×9.9,
=4.9×(10-0.1),
=4.9×10-4.9×0.1,
=49-0.49,
=48.51.