1) 3/7 + 0.8 = 3/7 + 0.8 = (3/7) + (0.8) = (3/7) + (8/10) = (30/70) + (56/70) = (30 + 56) / 70 = 86 / 70 = 43 / 35
2) 2/9 0.5 = (2/9) (1/2) = (21) / (92) = 2 / 18 = 1 / 9
3) 3 1/8 - 1.6 = 25/8 - 1.6 = 25/8 - 8/5 = (255 - 88) / (8*5) = (125 - 64) / 40 = 61 / 40
4) 4.5 : 9 / 2 = (4.5 / 9) / 2 = 0.5 / 2 = 0.5 * (1/2) = 0.5 / 2 = 0.25
1) 3/7 + 0.8 = 3/7 + 0.8 = (3/7) + (0.8) = (3/7) + (8/10) = (30/70) + (56/70) = (30 + 56) / 70 = 86 / 70 = 43 / 35
2) 2/9 0.5 = (2/9) (1/2) = (21) / (92) = 2 / 18 = 1 / 9
3) 3 1/8 - 1.6 = 25/8 - 1.6 = 25/8 - 8/5 = (255 - 88) / (8*5) = (125 - 64) / 40 = 61 / 40
4) 4.5 : 9 / 2 = (4.5 / 9) / 2 = 0.5 / 2 = 0.5 * (1/2) = 0.5 / 2 = 0.25