20/21-3/14
40/143+39/110
43/140+41/150
73/80+37/100

Предыдущий
вопрос Следующий
вопрос

To find the answers to these equations, we need to find a common denominator for each set of fractions and then perform the addition:

20/21 - 3/14:
Common denominator: 42
(20/21)(2/2) - (3/14)(3/3) = 40/42 - 9/42 = 31/42

40/143 + 39/110:
Common denominator: 715
(40/143)(5/5) + (39/110)(7/7) = 200/715 + 273/715 = 473/715

43/140 + 41/150:
Common denominator: 420
(43/140)(3/3) + (41/150)(28/28) = 129/420 + 1148/420 = 1277/420

73/80 + 37/100:
Common denominator: 400
(73/80)(5/5) + (37/100)(4/4) = 365/400 + 148/400 = 513/400