Ответ:\(2.8+1.9=4.7\);\(6.4+0.5=6.9\);\(8+2.6=10.6\);\(4.7+16=20.7\);\(2.58+1.4=3.98\);\(7.2+15.68=22.88\);\(0.906+12.8=13.706\);\(0.47+0.741=1.211\).