题目内容
脱式计算:
(1)79.2×1.5-36.54÷1.8
(2)
÷[
×(
-
)].
(1)79.2×1.5-36.54÷1.8
(2)
| 5 |
| 6 |
| 3 |
| 8 |
| 3 |
| 4 |
| 1 |
| 3 |
分析:本题根据四则混合运算的运算顺序计算即可,先算乘除,再算加减,有括号的要先算括号里面的.
解答:解:(1)79.2×1.5-36.54÷1.8
=118.8-20.3,
=98.5;
(2)
÷[
×(
-
)]
=
÷[
×
],
=
÷
,
=
.
=118.8-20.3,
=98.5;
(2)
| 5 |
| 6 |
| 3 |
| 8 |
| 3 |
| 4 |
| 1 |
| 3 |
=
| 5 |
| 6 |
| 3 |
| 8 |
| 5 |
| 12 |
=
| 5 |
| 6 |
| 5 |
| 32 |
=
| 16 |
| 3 |
点评:当算式中同时含有小括号与中括号时,要注意先算小括号里面的,再算中括号里面的.
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