0.34+0.2=
1-0.4=
0.18+0.02=
0.51+0.24=
0.7-0.23=
3.6+4.1=
2-1.6=
0.42+0.49=
30.07◯30.70 7.2◯7.200
35厘米=___米 260克=___千克
2.37+7.98= 4.92-2.09= ★10-6.57=
6.3+9.4+3.7 70.9-1.24-8.76
17- (3.4+2.08) 18- 8.2+1.57+1.8+0.43