1) (5,69 + 1,606) - 1,29 = 6,006
5,69 + 1,606 = 7,296
7,296 - 1,29 = 6,006
2) (3,7 - 2,388) + 0,76 = 2,072
3,7 - 2,388 = 1,312
1,312 + 0,76 = 2,072
3) (8,59 + 2,31) - (8,59 - 2,31) = 4,62
8,59 + 2,31 = 10,9
8,59 - 2,31 = 6,28
10,9 - 6,28 = 4,62
4) 54,002 - (28,7 - 5,001) = 30,303
28,7 - 5,001 = 23,699
54,002 - 23,699 = 30,303