要怎样算?
0.8=( ):5,( )等于多少?
这题怎么算,0.8怎样变比?
22 + (1/2)2 - √1又7/9 = (2×2) + (1/2×1/2) - √16/9 =4 + 1/4 - 4/3 =4又3/12 - 16/12 =(51-16)/12 =35/12 =2又11/12