Question

VA ROG DACA NU STITI NU DATI UN RASPUNS AM NEVOIE REPEDE DAU COROANA​

Answer 1

Buna!!!! Inainte sa incep sa-ți zic un secret: (daca ai numitori la fel doar trebuie sa scazi numaratorii si sa pui numitorul comun) PONT: (/=linia de fractie)

a. (4/7+5/7)•(10/27+4/27)= 9/7•14/27=126/189

b. (19/20-7/20)•(3/8+7/8)=
12/20•10/8=120/160

c. (11/15+1/15)•(7/9-2/8)
12/15•5/8=60/120


d. (27/25+13/25):(9/4-1/9)=
40/25:8/9=
40/25•9/8=
360/200


e. (7/6-5/6):(49/36-25/36)=
2/6:24/36
2/6•36/24
72/144


f. (7/8-1/8):(21/28+15/28)=
6/8:36/28=
6/8•28/36=
168/288


SUCCES SI O NOAPTE LINISTITA!