Объяснение:

[tex]1) \: 3 \times {( - 4)}^{2} = 3 \times 16 = 48 \\ 2) \: {( - 0.5)}^{2} \times {( - 2)}^{3} = 0.25 \times ( - 8) = \\ = - 2 \\ 3) \: 5 \times {3}^{2} + 3 \times {5}^{2} = 5 \times 9 + 3 \times \\ \times 25 = 45 + 75 = 120 \\ 4) \: {9}^{2} \times 3 + 100 \times {(0.1)}^{2} = 81 \times \\ \times 3 + 100 \times 0.01 = 243 + 1 = \\ = 244[/tex]