×+
÷a(1>a>0)
×18= 3.6×= 0.125××8= ++++=
×= 1.6×40%= 1+×= ×÷×=
1.25×80%= = 1﹣0.375= 6÷0.2=
= 2.35+4.7= = 16×0.25=
= =