题目内容
计算下题,能简便的要简便计算,并写出必要的过程.
①6.6-48×÷4.8 | ②×0.6+÷ |
③63×+36×+75% | ④[3.6-(+1÷3)]× |
⑤0.008×0.000125+0.0125÷0.04 | ⑥1----. |
解:①6.6-48×÷4.8 |
=6.6-2,
=4.6;
②×0.6+÷,
=×0.6+×0.6,
=(+)×0.6,
=1×0.6,
=0.6;
③63×+36×+75%,
=63×0.75+36×0.75+0.75,
=(63+36+1)×0.75,
=100×0.75,
=75;
④[3.6-(+1÷3)]×,
=[3.6-(+)]×,
=[3.6-3]×,
=0.6×0.4,
=0.24;
⑤0.008×0.000125+0.0125÷0.04,
=0.000001+0.3125,
=0.312501;
⑥1----,
=---,
=--,
=-,
=.
分析:①④⑤⑥按照运算顺序直接计算即可;
②③利用乘法分配律进行简算.
点评:解答此题注意运算顺序和简便运算,对于小数的混合运算,注意小数的位数,分数加减注意通分.
练习册系列答案
相关题目