6,7+3,875-(1,3+1,875) = 7,4
1) 1,3 + 1,875 = 3,175
2) 6,7 + 3,875 = 10,575
3) 10,575 - 3,175 = 7,4
8,12+1,93+1,88 = 11,93
1) 8,12 + 1,93 = 10,05
2) 1,88 + 10,05 = 11,93
5,945+28,3-30+8,41-0,1234 = 12,5316
1) 5,945 + 28,3 = 34,245
2) 34,245 + 8,41 = 42,655
3) 42,655 - 30 = 12,655
4) 12,655 - 0,1234 = 12,5316
