①8:3=24:x ② ③
×8=
÷=
×=
1÷25%=
÷4=
2.4×=
3020-105=
1.8+0.82=
4.8÷0.24=
4.2+8.7÷0.29=
+0.72=
1.25×0.8=
①x-x-=1
②:=x:1.6
①x+18=48
②
③x-0.2x=5.6