1﹣ + = 1÷ × = 0.5﹣ +0.5﹣ =
8.1+ = ( + )×24= 7× ×7÷ =
9﹣0.9= 72÷0.4= 1.25×8=
0.32=
- =
0.2×0.4=
1-0.09=
1÷×=
9.34+6.6=
×3÷×3=
3.14×8= 3²×3.14= 10×10%= 1÷ = 5÷ =
4- = + ×6= 1.25×0.4×8= × ÷ × =
×3= ×24= 6÷=
3.14×11-3.14= 0.22= 0.9÷0.01=
0.2- = 0.5×= 3÷×3=
100×÷0.1= ×3÷×3= 157÷3.14=
3.5+4.3= ÷ = 3.5÷0.07= × ÷ × =
- = 18- - = 0.32= × × =
正确计算:
错误的原因:
避免错误的方法:
=1×24
=24
解: (45%+30%) x=4.5
75%x=4.5
x=0.06
正确计算:45%+30%x=4.5
261﹣99= 17÷34= 2.1+0.79= 80×125%=
÷36= 38.38÷38= +×0= ×3÷×3=
0.56÷0.8= = = =
5×( )= 30×= 0.53= 3﹣=