题目内容
脱式计算
①2700×(506-499)÷900
②[1
+(0.65+
)÷
]×4.8.
①2700×(506-499)÷900
②[1
| 1 |
| 8 |
| 7 |
| 20 |
| 1 |
| 7 |
①2700×(506-499)÷900
=2700÷900×7,
=3×7,
=21;
②[1
+(0.65+
)÷
]×4.8,
=[1
+1÷
]×4.8,
=(1
+7)×4.8,
=
×4.8,
=39.
=2700÷900×7,
=3×7,
=21;
②[1
| 1 |
| 8 |
| 7 |
| 20 |
| 1 |
| 7 |
=[1
| 1 |
| 8 |
| 1 |
| 7 |
=(1
| 1 |
| 8 |
=
| 65 |
| 8 |
=39.
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