题目内容
(
×3.5+
)÷(13
-3
÷
)÷5
×
.
| 9 |
| 14 |
| 1 |
| 6 |
| 1 |
| 3 |
| 3 |
| 4 |
| 5 |
| 16 |
| 1 |
| 4 |
| 4 |
| 21 |
分析:把小数化为分数,进一步按运算顺序计算即可.
解答:解:(
×3.5+
)÷(13
-3
÷
)÷5
×
=(
×
+
)÷(13
-
×
)÷5
×
=(
+
)÷(13
-12)÷5
×
=
×
×
×
=
.
| 9 |
| 14 |
| 1 |
| 6 |
| 1 |
| 3 |
| 3 |
| 4 |
| 5 |
| 16 |
| 1 |
| 4 |
| 4 |
| 21 |
=(
| 9 |
| 14 |
| 7 |
| 2 |
| 1 |
| 6 |
| 1 |
| 3 |
| 15 |
| 4 |
| 16 |
| 5 |
| 1 |
| 4 |
| 4 |
| 21 |
=(
| 9 |
| 4 |
| 1 |
| 6 |
| 1 |
| 3 |
| 1 |
| 4 |
| 4 |
| 21 |
=
| 29 |
| 12 |
| 3 |
| 4 |
| 4 |
| 21 |
| 4 |
| 21 |
=
| 29 |
| 441 |
点评:计算注意运算顺序,抓住数字特点,灵活计算.
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