12和18 22和11 7和8
1.53-0.5=
7.8+0.9=
12÷0.4=
102=
23=
4×0.25=
2.9+3.7+2.1=
1.25×5×8=
7.6×8+2.4×8=
0.12×4=
500×0.002=
0.32=
+-+=
3.1-0.9+0.1=
7.3-=
+=
7+7÷21=
= = =
= = 1﹣=
8和9
6和24
30和45