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a)
- 10 + ( - 2) - ( - 8) + 4 = - 10 - 2 + 8 + 4 = - 12 + 12 = 0
b)
2 * (- 3)[(- 1) - 3 * (- 2)] = - 6 * (- 1 + 6) = - 6 * 5 = - 30
zad 2
b)
1369y² : 3 = 456 1/3 y²
c)
4154z : 2 = 2077z