在“0.39×258+258×0.26+B×258＝258”中，B=．
在“0.39×2+2×0.26+B×2＝2”中，B=______．0.39×2+2×0.26+B×2＝2”中，B=______．| 5 |
5 | | 8 |
8 | | 5 |
5 | | 8 |
8 | | 5 |
5 | | 8 |
8 | | 5 |
5 | | 8 |
8 |
答案和解析
0.39×2
+2×0.26+B×2=2
2×（0.39+0.26+B）=2
2×（0.65+B）=2
2×（0.65+B）÷2=2÷2
0.65+B=1
0.65+B-0.65=1-0.65
B=0.35．
故答案为：0.35． | 5 |
5 | 5
| 8 |
8 | 8+2
×0.26+B×2=2
2×（0.39+0.26+B）=2
2×（0.65+B）=2
2×（0.65+B）÷2=2÷2
0.65+B=1
0.65+B-0.65=1-0.65
B=0.35．
故答案为：0.35． | 5 |
5 | 5
| 8 |
8 | 8×0.26+B×2
=2
2×（0.39+0.26+B）=2
2×（0.65+B）=2
2×（0.65+B）÷2=2÷2
0.65+B=1
0.65+B-0.65=1-0.65
B=0.35．
故答案为：0.35． | 5 |
5 | 5
| 8 |
8 | 8=2
2×（0.39+0.26+B）=2
2×（0.65+B）=2
2×（0.65+B）÷2=2÷2
0.65+B=1
0.65+B-0.65=1-0.65
B=0.35．
故答案为：0.35． | 5 |
5 | 5
| 8 |
8 | 8
2
×（0.39+0.26+B）=2
2×（0.65+B）=2
2×（0.65+B）÷2=2÷2
0.65+B=1
0.65+B-0.65=1-0.65
B=0.35．
故答案为：0.35． | 5 |
5 | 5
| 8 |
8 | 8×（0.39+0.26+B）=2
2×（0.65+B）=2
2×（0.65+B）÷2=2÷2
0.65+B=1
0.65+B-0.65=1-0.65
B=0.35．
故答案为：0.35． | 5 |
5 | 5
| 8 |
8 | 8
2
×（0.65+B）=2
2×（0.65+B）÷2=2÷2
0.65+B=1
0.65+B-0.65=1-0.65
B=0.35．
故答案为：0.35． | 5 |
5 | 5
| 8 |
8 | 8×（0.65+B）=2
2×（0.65+B）÷2=2÷2
0.65+B=1
0.65+B-0.65=1-0.65
B=0.35．
故答案为：0.35． | 5 |
5 | 5
| 8 |
8 | 8
2
×（0.65+B）÷2=2÷2
0.65+B=1
0.65+B-0.65=1-0.65
B=0.35．
故答案为：0.35． | 5 |
5 | 5
| 8 |
8 | 8×（0.65+B）÷2
=2÷2
0.65+B=1
0.65+B-0.65=1-0.65
B=0.35．
故答案为：0.35． | 5 |
5 | 5
| 8 |
8 | 8=2
÷2
0.65+B=1
0.65+B-0.65=1-0.65
B=0.35．
故答案为：0.35． | 5 |
5 | 5
| 8 |
8 | 8
÷2
0.65+B=1
0.65+B-0.65=1-0.65
B=0.35．
故答案为：0.35． ÷2
| 5 |
5 | 5
| 8 |
8 | 8
0.65+B=1
0.65+B-0.65=1-0.65
B=0.35．
故答案为：0.35．
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