2.24. 1) -0.8 * (-0.5) 2) (-1.6)^2 * (-0.5) 3) 0.24 * (-2.5)^2 4) (0.4)^2 * (-2.5)^2 5) (-1 3/4)^2 * (-2/7)^2 6) (5/6)^3 * (-1 1/5)^2 2.25. 1) (-1 3/7)^2 * 3.375 * (-0.49) 2) -3.75 * (-4 2/9) * (2/3)^3 3) 0.125^2 * (-15.4) * (-4)^3 4) 0.25^3 * (-2.16) * (-8)^2 5) (-3 2/3)^2 * (2/3)^2 * (-2.25 * 5.5) 6) 2 4/7 * (-5.25) * (7 / (-2 * (-3)^2)) 2.26. 1) (19.701 + 5.66 + 7.068) * 1000 2) (4000 + 4000 + 4) * 0.025 3) 19.64 * (0.001 + 100 + 10 000) 4) 12.5 * (9.67 + 5.598 + 33.007) * 8 2.27. 1) (5.42 * 2.33 - 10.4) * 0.2^3 2) (0.55^2 * 100 + 12.45) * 0.01 3) (19.28 - 2.2^2 * 0.35) * 2.5^2 4) (2.5 * 1.2^2 - 1.6^2) * 5.11