а) a) -0.4 0.6(-4 1/6) = -0.4 0.6 (-25/6) = -0.4 * -4.1666... = 1.666...
б) (-1 6/7) 2 1/3 2 /13 = (-13/7) (7/3) (2/13) = -2
в) 2 1/3 - 1.8 = 7/3 - 1.8 = 7/3 - 5/3 = 2/3
г) 1.7- 3 5/6 = 1.7 - (23/6) = 10.2/6 - 23/6 = -12.8/6 = -2 4/6 = -2 2/3
д) 7/9 + 1/3 * 1.6 = 7/9 + 1.6/3 = 7/9 + 8/5 = (35 + 72) / 45 = 107/45
е) 2.9 3 1/3 - 0.07 5 3/4 = 2.9 (10/3) - 0.07 (23/4) = 29/10 10/3 - 7/100 23/4 = 29/3 - 161/100 = (2900 - 483) / 300 = 2317/300
ж) 1/6(-0.3+ 4 2/7) - 0.8(-4 1/2) = 1/6 (28/7 - 0.3) - 0.8 (-9/2) = 1/6 (27.7) + 0.8 4.5 = 27.7/6 + 3.6 = 138.5/6 = 23 1/6
а) a) -0.4 0.6(-4 1/6) = -0.4 0.6 (-25/6) = -0.4 * -4.1666... = 1.666...
б) (-1 6/7) 2 1/3 2 /13 = (-13/7) (7/3) (2/13) = -2
в) 2 1/3 - 1.8 = 7/3 - 1.8 = 7/3 - 5/3 = 2/3
г) 1.7- 3 5/6 = 1.7 - (23/6) = 10.2/6 - 23/6 = -12.8/6 = -2 4/6 = -2 2/3
д) 7/9 + 1/3 * 1.6 = 7/9 + 1.6/3 = 7/9 + 8/5 = (35 + 72) / 45 = 107/45
е) 2.9 3 1/3 - 0.07 5 3/4 = 2.9 (10/3) - 0.07 (23/4) = 29/10 10/3 - 7/100 23/4 = 29/3 - 161/100 = (2900 - 483) / 300 = 2317/300
ж) 1/6(-0.3+ 4 2/7) - 0.8(-4 1/2) = 1/6 (28/7 - 0.3) - 0.8 (-9/2) = 1/6 (27.7) + 0.8 4.5 = 27.7/6 + 3.6 = 138.5/6 = 23 1/6