7+66.3= ÷ = × ÷ = 8.9×11-8.9=
14÷ = ÷20%= ( + )×20= + × =
8.1-0.03=
13+62+15=
0.3×0.3=
8×25%=
3.14×20= 2×= 1+= ()×9=
72÷= 1.5×100= 1.25×8= 99×0.8+0.8=
1.5÷=
0.042÷0.6=
0.99+0.1=
0.4m3:25L(求比值)=
x
5
12
y
30
a