Question

Calculați cât mai simplu :
a) 1/31 + 3/31 + 6/31 + 4/31 + 7/31 + 9/31=?
b)5 3/7 + 2 5/11 + 3 6/13 + 9 6/11 + 6 7/13 + 4 4/7=?
c) 1/25 + 2/25 + 3/25 + 4/25 + 5/25 + 4/25 + 3/25 + 2/25 + 1/25=?
d) 21/23 + 2121/2323 + 212121/232323 + 21212121/23232323 =?

Vă rog ajutati-ma dau 22 de puncte și coroană
Plzzzzzzzzz

Answer 1

((1+9)+(3+7)+(6+4))/31=30/31

(5 3/7+4 4/7) + (2 5/11+ 9 6/11) + (3 6/13+6 7/13) = 10+12+10

5/25 +2(1/25+4/25) + 2(2/25+3/25) = 5/25+10/25+10/25=25/25=1

pentru d cred ca ceva nu e corect acolo...