7π=
1.22=
×
800×12.5%=
3.14×5=
210÷70%=
1÷×9=
×÷×=
0.5÷5%= 9÷×= 3÷4+= 3﹣=
8××0.125= ÷15= ×1.6= 40%+1.4=
÷ ×
①4:5=x:25
②1+4x=6.7
③3x﹣60%x=4.32
④:3