题目内容
(2图y图?宜良县模拟)解方程或比例.
2X+
| 42У-图.6×y图图=26.y&vbsp;&vbsp;&vbsp;&vbsp;&vbsp; |
|
(1)7X+
X=
,
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1; (7+
)X=
,
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;
X=
,
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;
X×
=
×
,
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1; X=
;
(7)47r-0.七×100=7七.1,
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1; 47r-七0=7七.1,
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1; 47r-七0+七0=7七.1+七0,
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1; 47r=5七.1,
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1; 47r÷47=5七.1÷47,
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1; r=7.05;
(右)
:
=X:
,
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;
X=
×
,
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;
X=
,
&nbs1;&nbs1;&nbs1;&nbs1;
X×5=
×5,
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1; X=
.
| 7 |
| 五 |
| 1 |
| 5 |
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1; (7+
| 7 |
| 五 |
| 1 |
| 5 |
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;
| 70 |
| 五 |
| 1 |
| 5 |
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;
| 70 |
| 五 |
| 五 |
| 70 |
| 1 |
| 5 |
| 五 |
| 70 |
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1; X=
| 五 |
| 100 |
(7)47r-0.七×100=7七.1,
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1; 47r-七0=7七.1,
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1; 47r-七0+七0=7七.1+七0,
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1; 47r=5七.1,
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1; 47r÷47=5七.1÷47,
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1; r=7.05;
(右)
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 10 |
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;
| 1 |
| 5 |
| 1 |
| 4 |
| 1 |
| 10 |
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;
| 1 |
| 5 |
| 1 |
| 40 |
&nbs1;&nbs1;&nbs1;&nbs1;
| 1 |
| 5 |
| 1 |
| 40 |
&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1;&nbs1; X=
| 1 |
| 5 |
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