Răspuns:
Explicație pas cu pas:
a) (5/6+3/4)×24/19-(2/3-1/6)×4/3=(5x2+3x3)/12×24/19-(2x2-1)/6×4/3=
=19/12×24/19-3/6×4/3=1-2/3=1/3
b)(1/6+7/9)·18/17+2/3·(1/7-1/21)=(3x1+7x2)/18·18/17+2/3·(3-1)/21=
=17/18×18/17+4/63=1+4/63=67/63 (sigur la al doilea termen e inmultire?)
c)(5/6+7/8)·18/41+4/25(3/4-1/2-1/8)=(5x4+7x3)/24×18/41+4/25(3x2-4×1-1)/8=
41/24×18/41+4/25××1/8=3/4+1/50=(3x25+2x1)/100=77/100
d) (5/12-3/18)×4+1/11+(4-3)/3×3=(5x3-3x2)/36×4+1/11+3×1/3=9/36×4+1/11+1=
=1+1/11+1=2+1/11=23/11
