填空(用小数表示结果)'M;i9s8P+D
1.3米7厘米+150厘米=(~)]5t0^(f(l:O6c'M;i9s8P+D
2.6元8角5分+5元2角='Z+E8g+?1R/a4t9o3K'M;i9s8P+D
3.5吨30千克+250千克=7F0N5v;Q2c7Q:m(l8m8a'M;i9s8P+D
4.3吨50千克-2吨120千克=3v-O6z/o,s.t6Z:]'M;i9s8P+D