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.
÷4.8