题目内容
[(14
-(3.78-3.78÷1
)×1
+40×40%)]÷28
.
| 1 |
| 3 |
| 2 |
| 7 |
| 2 |
| 3 |
| 14 |
| 15 |
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:[14
-(3.78-3.78÷1
)×1
+40×40%]÷28
=[
-(3.78-3.78×
)×
+16)]÷28
,
=[
-(3.78-2.94)×
+16]÷28
,
=[
-0.84×
+16]÷28
,
=[
-
+16]÷28
,
=[12
+16]÷28
,
=28
÷28
,
=1.
| 1 |
| 3 |
| 2 |
| 7 |
| 2 |
| 3 |
| 14 |
| 15 |
=[
| 43 |
| 3 |
| 7 |
| 9 |
| 5 |
| 3 |
| 14 |
| 15 |
=[
| 43 |
| 3 |
| 5 |
| 3 |
| 14 |
| 15 |
=[
| 43 |
| 3 |
| 5 |
| 3 |
| 14 |
| 15 |
=[
| 43 |
| 3 |
| 7 |
| 5 |
| 14 |
| 15 |
=[12
| 14 |
| 15 |
| 14 |
| 15 |
=28
| 14 |
| 15 |
| 14 |
| 15 |
=1.
点评:本题的数据较为复杂,且不能运用简便方法计算,完成时要细心,注意通分约分.
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