14× =
6÷ =
÷ =
8× =
÷8=
10%× =
15÷1%=
× =
1÷0.01=
55× +45÷
÷( + )
( + )× +
201× ﹣
﹣( ÷ ﹣ )
( + ﹣ )×24
如图是个直角梯形,上底:高:下底=2:3:4,请动手把它分成面积比是1:2:3的三部分.