Question

Doar ex 9 punctete e f g h

Answer 1

Răspuns:

Explicație pas cu pas:

e)(-2 1/21)+(-1 2/7+2/3)=-43/21+(-9/7+2/3)=-43/21+(-27+14)/21=

=-43/21-13/21=-56/21

f) (1 1/6+3 2/9)+(-1 2/3+2 7/18)=(7/6+29/9)+(-5/3+43/18)=(21+58)/18+(-30+43)/18=(79+13)/18=92/18=46/9

g) -2 5/45+(3 2/5-1 4/15)+(-7/45)=-95/45+(17/5-19/15)-7/45=

-95/45+(51-19)/15-7/45=-95/45-7/45+32/15=-102/45+96/45=-6/45=-2/15

h) (-7 1/3+1 2/9)+(-2 2/3+5/9)=(-22/3+11/9)+(-8/3+5/9)=(-66+11)/9+(-24+5)/9=

(-55-19)/9=-74/19