①26×15﹣200
②8×4×12.5×0.25
③×+
④12÷[()×]
× =
6﹣4.92=
25×0.7×4=
+0.5=
3- =
6.3÷0.21=
1﹣1÷ =
(0.6- )×16=
x+60%x=28
0.3:90%=12:x
3.2﹣2.5x=0.7
4321+500= 13.2-5.2= × = 0.2×1.4=
8÷25%= + = 2.4÷ = ÷ =