EVALUACION Nª 2
1.- ¾ + 6/7 + 2
¾ + 6/7 + 2/1 = 21 +24 56 = 101/28 = 3 17/28
28
¾ + (6/7 + 2/1) = ¾ + ( 6 + 14) = ¾ + 20/7 = 21 + 80 = 101/28 = 3 17/28
7 28
2.- 6/2 + 7/4 + 5 /15
3/1 + 7/4 + 1/3 = 36 + 21 + 4 = 61/12 = 5 1/12
12
(3/1 + 7/4) + 1/3 = (12 + 7) + 1/3 = 19/4 + 1/3 = 57 +4 = 61/12 = 5 1/12
4 12
3.- 2/9 + 10/15 + 8/3
2/9 + 2/3 + 8/3 = 2+6+24 = 32/9 = 3 5/9
9
2/9 + (2/3 + 8/3) = 2/9 + 10/3 = 6 + 90 = 96/27 = 32/9 = 3 5/9
27
4.- 1 ½ + 5 6/7 + 8/9
3/2 + 41/7 + 8/9 = 189 + 738 + 112 = 1039/126 = 8 31/26
126
(3/2 + 41/7) + 8/9 = (21 + 82) = 8/9 = 103/14 +8/9 = 927 + 112 = 1039/126 = 8 31/26
14 126
