方程:7X﹣16=66+2X的解是X= .0.8小时= 分;75千克= 吨.
0.75== ÷16=27: = %.
= : =33÷ = %
÷4=25%= : =8÷ = 折.
0.75= : = :25= 折= %= (成数)
10: ==0.625=5÷ = %