Question

Calculati :

1- 1 supra 2 - 1 supra 3

72 supra 25 - 1 supra 5 + 2 supra 25

13 supra 43 + 8 supra 43 + 11 supra 43

109 supra 18 + 11 supra 18 - 56 supra 18

Va rog ajutati-ma Asta e Ultima intrebare

Answer 1

1 - 1/2 - 1/3 = 6/6 - 3/6 - 2/6 = 1/6
72/25 - 1/5 +2/25 = 72/25 - 5/25 +2/25 =69/25
13/43+8/43+11/43=32/43
109/18 + 11/18 - 56/18 = 64/18   

Answer 2

1-1/2-1/3=1/1-1/2-1/3 amplifici prima fractie cu 6,a2a cu 3,a3a cu 2
6/6-3/6-2/6=1/6

72/25-1/5+2/25 amplifici a2a fractie cu 5
72/25-5/25+2/25=69/25

13/43+8/43+11/43=32/43

109/18+11/18-56/18=64/18=32/9