Question

Efectuați calculele:​

Answer 1

Răspuns:

Explicație pas cu pas:

a) (12/7)*(7/3-7/4)= (12/7)*7/12=1

b) 4/3+15/3(17/5-5/3)=4/3+15/3*((51-25)/15)=4/3+15/3*26/15=4/3+26/3=10

c) 91/8-( 17/6-11/8)*(12/7)=91/8-((68-33)/24)*12/7=(91/8)-35/24*(12/7)=91/8-(5/2)=(91-20)/8=71/8

d) 11/3-3/17*( 23/7-5/3)=11/3-3/7*(69-35)/21=11/3-3/7*(34/21)=11/3-(34/49)=437/147

introducerea intregului in fractie se face inmultindu l cu numitorul apoi adunand cu numaratorul si apoi totul supra numitorul fractiei initiale

calculul cmmmc= numitorul comun se face descompunand numitorii in factori primi  si cmmmc este produdul factorilor care se repeta sau nu la puterea cea mai mare

Answer 2

Răspuns:

Explicație pas cu pas:

a) (12/7) x (7/3-7/4)= (12/7) x 7/12=1

b) 4/3+15/3(17/5-5/3)=4/3+15/3 x [(51-25)/15]=4/3+15/3 x 26/15=4/3+26/3=10

c) 91/8-( 17/6-11/8) x (12/7)=91/8-((68-33)/24) x 12/7=

=(91/8)-35/24 x (12/7)=91/8-(5/2)=(91-20)/8=71/8

d) 11/3-3/17 x ( 23/7-5/3)=11/3-3/7 x (69-35)/21=11/3-3/7 x (34/21)=

=11/3-(34/49)=437/147