化简下列各式: (1)[(0.0641/5)−2.5]2/3−333/8−π0; (2)2lg2+lg3/1+1/2lg0.36+1/4lg16.

问题描述:

化简下列各式:
(1)[(0.064

1
5
)−2.5]
2
3
3 3
3
8
π0
(2)
2lg2+lg3
1+
1
2
lg0.36+
1
4
lg16

(1)原式={[(641000)15]−52} 23−(278)13−1(2分)=[(410)3]15×(−52)×23−[(32)3]13−1(4分)=52−32−1(6分)=0(7分)(2)原式=2lg2+lg31+12lg0.62+14lg24=2lg2+lg31+lg2×310+lg2(4分)=2lg2+lg31...