Question

dau 5 steluteeeee va rog ajutati.ma​

Answer 1

Răspuns:

a)24/10 +1/9(-7/10+2(-3*2+1*11)22)=24/10+1/9(-7/10+ 5/11)=24/10+1/9(-7*11+5*10)110=24/10 + (1/9 * (-27/110))=24/10-27/990= (24*99-27)/990=2349/990=261/110

c) (-9/10)* 0 *(-20/21)=0

b) -3/41* (2*20+1)/2-8/3(1- 5/13*13/2)=-3/41*41/2-8/3*(1-5/2)=-3/2-8/3(2-5)/2=-3/2-8/3* (-4)/2=-3/2-8/3*(-2)=(-3-(-16))/2=13/2

d)-4/5*( -3*2+1)/16+ 3/10*(2-1)/2=-4/5*(-5)/16+3/10*1/2=4/16+3/20=1/4+3/20=8/20=2/5

Explicație pas cu pas:

c) partea intreaga a lui 0 si cv este 0

orice numar inmultit cu 0=0

b) a/b : c/d= a/b*d/c