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

Предыдущий
вопрос Следующий
вопрос

To solve these problems, we need to find a common denominator for each pair of fractions and then perform the required operation.

20/21 - 3/14
Common denominator: 42
So, the expression becomes: (202)/(212) - (33)/(143) = 40/42 - 9/42 = 31/42

40/143 + 39/110
Common denominator: 1430
So, the expression becomes: (4010)/(14310) + (3913)/(11013) = 400/1430 + 507/1430 = 907/1430

43/140 + 41/150
Common denominator: 4200
So, the expression becomes: (4330)/(14030) + (4128)/(15028) = 1290/4200 + 1148/4200 = 2438/4200 = 1219/2100

73/80 - 37/100
Common denominator: 400
So, the expression becomes: (735)/(805) - (374)/(1004) = 365/400 - 148/400 = 217/400