题目内容
(7
-6
)÷[2
+(4-2
)÷1.45].
| 5 |
| 18 |
| 11 |
| 15 |
| 14 |
| 15 |
| 1 |
| 15 |
分析:此题应按运算顺序进行计算,先算小括号内的减法,再算中括号内的除法,然后算中括号内的加法,最后算括号外的除法.
解答:解:(7
-6
)÷[2
+(4-2
)÷1.45],
=(7
-6
)÷[2
+1
÷1
],
=
÷[2
+
×
],
=
÷[2
+
],
=
÷
,
=
×
,
=
.
| 5 |
| 18 |
| 11 |
| 15 |
| 14 |
| 15 |
| 1 |
| 15 |
=(7
| 25 |
| 90 |
| 66 |
| 90 |
| 14 |
| 15 |
| 14 |
| 15 |
| 9 |
| 20 |
=
| 49 |
| 90 |
| 14 |
| 15 |
| 29 |
| 15 |
| 20 |
| 29 |
=
| 49 |
| 90 |
| 14 |
| 15 |
| 20 |
| 15 |
=
| 49 |
| 90 |
| 64 |
| 15 |
=
| 49 |
| 90 |
| 15 |
| 64 |
=
| 49 |
| 384 |
点评:此题考查了四则混合运算的运算顺序,有小括号又有中括号的,应先算小括号内的,再算中括号内的,最后算括号外的.
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