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a fost răspuns

Efectuați adunările:
a) (-9/10)+(-7/12)+(+19/30)+(+1/5)
b) (-3/8)+(+1/16)+(-1/2)+(-3/4)
c) (+5/4)+(-4/5)+(-5/2)+(+7/10)

Repede

Răspuns :

Spidie
a) (-9/10)+(-7/12)+(+19/30)+(+1/5)= ( -54 -35 +38+12) /60= -39/60== -13/20


b) (-3/8)+(+1/16)+(-1/2)+(-3/4)= (-6+1- 8- 12)/16= -25/16


c) (+5/4)+(-4/5)+(-5/2)+(+7/10)=(25-16-50+14)/20= -27/20

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