①-(+)
②6--
③-(-)
④+-+
⑤+-
⑥-(+)
9.5+4.2=
0.8×1.3=
14.1÷3=
3.5×2=
8.1-2.7=
1.4×0.3=
7.9+0.1=
2.5×4=
3x+4x=
5.69-1.7=
2.5÷0.5=
7.2-1.08=
5-3.2=
5.8+5.7=
3.5÷2÷5=
4÷0.8=
9+2.19=
6b-5b=
16.5-(6.5+2.7)=
10-6.2-1.8=
②-(-)
③+2.25-0.375+7.75
①5.66-0.96÷6×5
②4.12×6.9-4.12+4.12×1.1
③(1÷0.2+0.2÷1)÷(6-0.8)
④(4.3-0.52)÷3.6+6.4
⑤1.4÷(0.14×0.25)
⑥1.2-1.2×[0.01÷(1-0.9)]
①120×4×0.25×0.7
②51×7.5-49×7.5-1
③(20+9.744÷2.4)×0.5-1.93
④[3.72-0.72×(1.6+2.4)]÷0.1
0.5152>0.5152>0.5152>0.5152。