4×= ÷3= 75%-= 0×= ×=
+= ÷= 1.25×0.8= 1÷30%= 12--=
×20= ÷= 10÷= 0.6×=
1÷= ×= ÷= ÷=
×1.2= ×0= ÷4= -20%=
÷= 32×= 0.3²= ×÷×=
×3=
×24=
×=
÷×÷=
÷=
×0.375=
××=
口诀: