36× = 18÷ = 7× = =
①
②
③
④
2.4×50%=
60×30%=
21÷70%=
84÷40%=
2-57%=
1.2+20%=
36×75%=
57÷57%=
4.9×= ÷= ×60%= (-)×28=
20÷10%= 2.25-= 42×8%= ×÷×=
×12= 14÷=
0.5×0.6= 1-= ÷2=
3.14×9= 7.2×= 1.25××0.8=
3.14×2.25= 12×()=
提问:
-= 20÷= 0.77+0.23= +2-+2=
0.3÷0.5= ×7.2= 4000÷80= 1.5×4+6=