①
②4.2×99+4.2
③
④
1+15%= 1÷50%= 37.5%+ = 6- = 0.77+0.33= 16×2.5=
+ = ÷ = 1.25×0.8= :5= 7÷1.4= 9+ =
+0.375=
0.2²=
910÷70=
12-2=
()×24=
×11=
÷5=
1-×2=
25×4%=
=
①75%x=360
②(1-55%)x=90
③31%x-66=8.4
④25%x+50%x=420
①0.25×1.25×3.2
②36×( + ﹣ )
① =
②0.25: =2:x
③ :3=x:4
④ : =x:0.1
⑤40: =x:1
⑥ =
0.7﹣ = × = + =
15÷ = ( + )×6= 1.25× ×8=