化简比 28:35 16:32 12:22 36:72 16:18 12:24
求比值 23:38 45:49 57:10 20:23 32:29 35:41
35:47 13:17 25:27 23:29 39:40 53:100
12:13 14:25
口算 1-25%-35%=
1÷2=()%
33×1/2=
25÷1/2=
15%+25%=
(9/7+12/19)×0=
33%+57%=
16×3/16=
(8/7-1/7)×2=
52÷82%×0=
13×1×1/2=
23×3/5×5/3=
50 16.5 12.5 0.4 0 0.92 3 2 0 6.5 23