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asociati convenabil termenii si efectuatii: a) 11/10+7/30+2/17+11/51=
b) 1/11+1/23+9/22+21/46=
c)1/99+37/65+97/99+28/65=
Ajutati-ma va rog dau coronita si 20 de puncte


Răspuns :

Aduci la acelasi numitor comun cate 2 astfel
a) 11/10+7/30+2/17+11/51 = 33/30+7/30 + 6/51 + 11/51 = 40/30 + 17/51 = 
     4/3+1/3 = 5/3  = 1 + 2/3
b)  1/11+1/23+9/22+21/46 (numitor comun primul cu al 3 lea si 2 cu 4) -->
      2/22+9/22 + 2/46+21/46 = 11/22 + 23/46 = 1/2 +1/2 = 1 
c) primul cu 3 si 2 cu 4:
    1/99+97/99 + 37/65 + 28/65 = 98/99 + 65/65 = 98/99+1
11/10+7/30+2/17+11/51=
=(3*
11+7)/30+(2*3+11)/51=
=40/30+17/51=
=4/3+1/3=5/3

b) 1/11+1/23+9/22+21/46=
= 1/11+9/22+1/23+21/46=
= (1*2+9)/22+(1*2+21)/46=
=11/22+23/46=
=1/2+1/2=2/2=1

c)1/99+37/65+97/99+28/65=
=1/99+97/99+37/65++28/65=
=98/99+65/65=
=98/99+1=
=(98+99)/99=
=197/99