1÷= += 1.6×5= +÷2=
0.625×8= -= ×÷×= ÷×0=
×100= ÷ = 0.75× = ÷ = ×0÷ =
6÷ = ÷2= 75× = × = 时:80分钟=
0.56×= ÷= 12.5%×= 1.5:0.25=(化简比)
7.2÷= 0.34÷10%= 12×= :0.45=(求比值)
x
6
12
18
24
…
y
30
15
10
7.5