For the first question The number given is = 4 7/8 = 39/8 Let us assume the number to be added is = x 39/8 + x = 7 (39 + 8x) = 7 * 8 39 + 8x = 56 8x = 56 - 39 8x = 17 x = 17/8 = 2 1/8 So 2 1/8 should be added to get 7
Regarding the second question The number given is = 2 1/7 = 15/2 Let us assume the number to be added = y (15/2) + y = 4 15 + 2y = 4 * 2 15 + 2y = 8 2y = 8 - 15 2y = - 7 y = - 7/2 = - 3 1/2 So the number that needs to be added is - 3 1/2.
Regarding the third question The number given is = 5 2/9 = 47/9 Let us assume the number to be added = z Then (47/9) + z = 7 47 + 9z = 7 * 9 47 + 9z = 63 9z = 63 - 47 9z = 16 z = 16/9 = 1 7/9 So the number that needs to be added is 1 7/9.
