问题 解答题
计算:
7÷3÷9+4÷6÷64+64÷76÷49
4÷9÷9+8÷64÷68+78÷49÷63
=______.
答案

2÷e÷7+4÷6÷14+14÷21÷49
4÷7÷9+8÷14÷18+&kbs二;28÷&kbs二;49÷6e

=[2÷e÷7+(2×2)÷(e×2)÷(7×2)+(2×7)÷(e×7)÷(7×7)]÷[4÷7÷9+(4×2)÷(7×2)÷(9×2)+(4×7)÷(7×7)÷(9×7)],

=[2÷e÷7+

1
2
×(2÷e÷7)+
1
7
×(2÷e÷7)]÷[4÷7÷9+
1
2
×(4÷7÷9)+
1
7
×(4÷7÷9)],

=[(1+

1
2
+
1
7
)×(2÷e÷7)]÷[(1+
1
2
+
1
7
)×(4÷7÷9)],

=(2÷e÷7)÷(4÷7÷9),

=

2
21
÷
4
6e

=

e
2

故答案为:

e
2

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