Răspuns:
[tex](6 \times 8) \div a = 8 \\ 48 \div a = 8 \\ a = 48 \div 8 \\ a = 6 \\ \\ [/tex]
[tex](29 - 19) \div a = 1 \\ 10 \div a = 1 \\ a = 10 \div 1 \\ a = 10[/tex]
[tex](4 \times 2 \times 9) \div a = 8 \\ 72 \div a = 8 \\ a = 72 \div 8 \\ a = 9[/tex]
[tex](2 \times 9) \div a = 3 \\ 18 \div a = 3 \\ a = 18 \div 3 \\ a = 6[/tex]
[tex](11 + 19) \div a = 6 \\ 30\div a = 6 \\ a = 30 \div 6 \\ a = 5[/tex]
[tex](3 \times 2 \times 8) \div a = 6 \\ 48 \div a = 6 \\ a = 48 \div 6 \\ a = 8[/tex]
