1, 85,07+3,03=88,1
25,6+0,41=26,01
56+0,37=56,37
2, 6,37+17,45=23,82
9,01+5,66=14,67
3, 86+1,25=5,11
3, 0,809+63,7=64,509
5,86+0,08=5,94
4, 4,2x+1.8x+5.3y+2.6y
12.75a+9.55a+1.85b+3.5b