0.98+9.2=
4.6÷0.1=
0.2×25=
7.5+2.5÷5=
6.8×(101﹣1)=
2﹣=
+=
2.7÷=
2﹣﹣=
3×÷3×=
1﹣+= 1÷×= 0.5﹣+0.5﹣=
8.1+= (+)×24= 7××7÷=
86+124= ×63=49
2﹣= 1÷×=
10﹣3.6= 8.32÷4=
0.25×0.25= 0.38×90+3.8=
+ =
90﹣40=
1.25×4=
100÷25=
9+2﹣5=
÷ ×7=
20%+0.8= 1-1÷7= + = × =
0.12= 5÷ × = ×8÷ ×8=
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﹣=