0.68+0.69+0.70+0.71+0.72+0.73+0.74
2.4+5.75.7+2.4 52.1+72.1-43.6543.65+(72.1-52.1)
12.34-2.95.73+4.1 35.6+4.6+7.0135.6+4.4+7.21
x-19.42=10.58
x=
①问题:
②问题:
6.65+3.343.43+6.56

0.26+2.6= 9.9+1= 5.28−0.8= 100−54.54=
3.4+4.6+12.64= 47-24.75−22.25=