计算:
把下面百分数化成小数或整数。52%= 1.23%= 248%= 70%=0.4%= 15%= 100%= 2000%=
把下面各数化成百分数。0.27= 1.52= 0.5= 0.08=3.28= 10.06= 32= 0.005=
把下面的分数化成百分数:= = = == = = =≈ ≈ 10= 5=
把下面百分数化成分数。28%= 160%= 0.8%= 5%=75%= 24%= 65%= 125%=
解方程(口头检验)2x-2.8×2.5=8.96 4x+12×3=56(x+0.8)×8=48 (x+2.4)÷3=2.5