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a fost răspuns

Stiind ca a·b=7 3/11, a··c=3 5/22, a·d= 4 13/33, calculati  a(b-c+d)

Răspuns :

Mikigabi22gabi
a*b=80/11
a*c=71/22
a*d=145/33
a(b-c+d)=ab-ac+ad=80/11-71/22+145/33=
aducem la acelasi numitor   66
480-213+290/66=557/66=8  29/66

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