用科学记数法表示下列各数:① 0.5^4= _____② (0.2^3)^2= _____

问题描述:

用科学记数法表示下列各数:
① 0.5^4= _____
② (0.2^3)^2= _____

楼主不急啊
1. 0.5^4=0.5*0.5*0.5*0.5=0.0625=6.25*10^-2
2. (0.2^3)^2=0.2^6=0.2*0.2*0.2*0.2*0.2*0.2=0.000064=6.4*10^-5
OK咯、

0.5^4=0.0625=0.625X10^(-1)
(0.2^3)^2= 0.000064=0.64X10^(-4)

1。=6.25×10∧-2
2。=0.008*0.008=0.000064=6.4*10∧5

① 0.5^4= 5^4 × 10^(-4)=625×10^(-4)=6.25×10^(-2)
② (0.2^3)^2= 2^6 × 10^(-6)=64×10^(-6)=6.4×10^(-5)

(1) 0.5^4 =0.0625=6.25×10^(-2)
(2)(0.2^3)^2=(0.008)^2=0.000064=6.4×10^(-5)