7.5×100=
1.3+2.4=
25×40=
630÷90=
4.8×=
÷14=
:和16:18 12:18和8:16 0.2:0.7和7:14
组成的比例:( )
420 - 190= 17.88+0.2= 2.5×0.4= 1÷0.2=
= =
300-79= 0.4×0.8= 1+0.05= 7.26+2.64=
= 1.25×32= ×25%= =
×1= 1.2× = 4× = × =
× = × = × = 1.5× =
A.(1,1)
B.(3,1)
C.(3,2)
时75分 3吨40千克3.4吨
5200立方厘米5.2升 4.5公顷450平方米