共30题用时5分钟
6.4-4=
0.6÷3+3=
0.91÷13=
3.25+0.75=
0.48÷6=
9.9-0.9÷0.1=
100-63=
3.2+1.68=
0.5+0.5÷0.5=
50×0.8=
17×40=
0.99÷33=
1.3×7=
6.4÷4=
2.1×40÷10=
2.8×0.4=
4.5×0.1=
2÷0.4=
1.92÷0.04=
0.4×0.8=
5-0.05=
4×0.2=
14-7.4=
1.7-0.47=
3÷0.25=
0.32×500=
0.65+4.35=
10-5.4=
2.5×3=
4÷20=