Răspuns:
4.
[tex]17 + 9 \times 3 + 2 \times (27 - 5 \times 5) - 3 \times (42 - 7 \times 5) = \\ 17 + 27 + 2 \times (27 - 25) - 3 \times (42 - 35) = \\ 44 + 2 \times 2 - 3 \times 7 = \\ 44 + 4 - 21 = \\ 48 - 21 = 27[/tex]
5.
[tex](2 + 8) \div 5 \times 8 - 10 = 6[/tex]
6.
[tex]2 + 8 \div 4 - 2[/tex]
