题目内容
脱式计算
| ①163+20020÷70-70 | ②1.56÷5.2×1.8÷0.12 | ||||||
③10-(
|
④6.8÷[(1.55+0.15)×50%]. |
①163+20020÷70-70,
=163+286-70,
=449-70,
=379;
②1.56÷5.2×1.8÷0.12,
=0.3×1.8÷0.12,
=0.54÷0.12,
=4.5;
③10-(
| 3 |
| 8 |
| 1 |
| 2 |
| 3 |
| 8 |
=10-
| 7 |
| 8 |
| 3 |
| 8 |
=10-
| 7 |
| 3 |
=7
| 2 |
| 3 |
④6.8÷[(1.55+0.15)×50%],
=6.8÷[1.7×50%],
=6.8÷0.85,
=8.
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