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[tex]j) \: 2.4 \times 0.25 \div 0.02 = \\ 0.6 \div 0.02 = 30 \\ \\ [/tex]
[tex]k) \: {3.5}^{3} \div 3.5 \times 3.5^{0} = \\ 42.875 \div 3.5 \times 1 = \\ 12.25 \times 1 = 12.25[/tex]
[tex]l) \: {1.2}^{2} \div 1.2 - 1.2 = \\ 1.44 \div 1.2 - 1.2 = \\ 1.2 - 1.2 = 0[/tex]
[tex]m) \: 6.7 + {6.7}^{2} \div 6.7 - 6.7 = \\ 6.7 + 44.89 \div 6.7 - 6.7 = \\ 6.7 + 6.7 - 6.7 = \\ 13.4 - 6.7 = 6.7[/tex]
[tex]n) \: 123.23 - {3.4}^{2} \div 3.4 - 12.57 = \\ 123.23 - 11.56 \div 3.4 - 12.57 = \\ 123.23 - 3.4 - 12.57 = \\ 119.83 - 12.57 = 107.26[/tex]