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Clementedcc
a fost răspuns

calculati
a) 1/63+5/63+3/63 , b) 1/2+3/4+1/5,
c) 3/4-1/6 , d) 2 1/2x2/3x1/5 , e) 3 1/2:21/4

Răspuns :

CosmoteRo
1/63+5/63+3/63=9/63=1/7
1/2+3/4+1/5=10/20+15/20+4/20=29/20
3/4-1/6=9/12-2/12=7/12

31/2:21/4=31/2x4/21