题目内容
A=
,那么100A的整数部分是______.
| 11×77+12×78+13×79+14×80 |
| 11×76+12×77+13×78+14×79 |
A=
=
=
=
=
100A=100×
=
≈101.3
100A的整数部分是101.
故答案为:101.
| 11×77+12×78+13×79+14×80 |
| 11×76+12×77+13×78+14×79 |
=
| 12×(77+78+79+80)-77+79+160 |
| 12×(76+77+78+79)-76+78+158 |
=
| 12×314+162 |
| 12×30+160 |
=
| 12×(314+13.5) |
| 12×(310+13.33) |
=
| 327.5 |
| 323.33 |
100A=100×
| 327.5 |
| 323.33 |
| 32750 |
| 323.33 |
100A的整数部分是101.
故答案为:101.
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