+ =
5.4×=
﹣ =
6×3.14=
÷ =
39%+28%=
1﹣16%﹣54%=
①15:x=7:28
②34:x=0.25:8
③x:15=30:18
④14:56=x:113
480-10=470
400÷8=50
5.43+5.57= 125×72= 299÷102≈ 6×÷6×=
5%×56= 33= = =