4x﹣1=2.6
x:3.5=3:7
1.2:x=4:2.5
8:x=7:0.5
3.2:0.2=x:
①67%×4.3+4.3×33%
②(+0.375)×48
③0.875×25+75×87.5%
1.2:7.5=0.4:x
6-3.75= -25%= +0.75= 1.5- =
( + )×4= 0.1×0.99= 0×0.75= ÷6=
1÷ - ÷1=
-=
×=
2÷=
÷6=
2×=
:=
8.4÷4.2=
10÷1%=
1÷3×=
0÷×14=
90×80%= 96÷(1﹣90%)=
×÷×= 3.11×6=
4000×37.5%= ×=
+﹣+= a﹣a×0=
①﹣+-
②(﹣)×18×12
③2×1.5+4.5÷0.75
④69×9.9+6.9