题目内容
16
×2.375-
÷
+12
×4.75=
| 8 |
| 247 |
| 4 |
| 195 |
| 2 |
| 15 |
| 4 |
| 285 |
59
| 116 |
| 195 |
59
.| 116 |
| 195 |
分析:通过观察,本题把小数化为分数计算比较简便.
解答:解:16
×2.375-
÷
+12
×4.75,
=16
×2
-
×
+12
×4
,
=
×
-
+
×
,
=
-
+
,
=
+
,
=59
.
| 8 |
| 247 |
| 4 |
| 195 |
| 2 |
| 15 |
| 4 |
| 285 |
=16
| 8 |
| 247 |
| 3 |
| 8 |
| 4 |
| 195 |
| 15 |
| 2 |
| 4 |
| 285 |
| 3 |
| 4 |
=
| 3960 |
| 247 |
| 19 |
| 8 |
| 2 |
| 13 |
| 3424 |
| 285 |
| 19 |
| 4 |
=
| 495 |
| 13 |
| 2 |
| 13 |
| 856 |
| 15 |
=
| 493 |
| 13 |
| 856 |
| 15 |
=59
| 116 |
| 195 |
点评:本题考查学生对分数和小数混合运算的能力,数值比较大,计算是要有耐心.
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