1) 5,4 + (3,7 – 5,4)= 5.4 + 3.7 - 5.4 = 3.7;
2) -8,79 + ( –1,76 + 8,79)= -8.79 - 1.76 + 8.79 = -1.76;
3) (4,67 – 3,94) + (3,94 – 3,67)= 4.67 - 3.94 + 3.94 - 3.67 = 1;
4)7,2 – (3,2 – 5,9)= 7.2 - 3.2 + 5.9 = 9.9;
5) ( 4,8 + 2,75) – (4,8 – 3,25)= 4.8 + 2.75 - 4.8 + 3.25 = 6;
6) –6,9 – (4,21 – 10,9)= -6.9 - 4.21 + 10.9 = 4 - 4.21 = -0.21.
1) 5,4 + (3,7 – 5,4)= 5.4 + 3.7 - 5.4 = 3.7;
2) -8,79 + ( –1,76 + 8,79)= -8.79 - 1.76 + 8.79 = -1.76;
3) (4,67 – 3,94) + (3,94 – 3,67)= 4.67 - 3.94 + 3.94 - 3.67 = 1;
4)7,2 – (3,2 – 5,9)= 7.2 - 3.2 + 5.9 = 9.9;
5) ( 4,8 + 2,75) – (4,8 – 3,25)= 4.8 + 2.75 - 4.8 + 3.25 = 6;
6) –6,9 – (4,21 – 10,9)= -6.9 - 4.21 + 10.9 = 4 - 4.21 = -0.21.