4 блок, 1-5 Благодарю

1) (-8 7/15+(-4 1/3))+(-2,2)= (-8 7/15-4 5/15)-2 1/5= -12 12/15- 2 3/15= -14 15/15= -15 2) (-4 5/14+3 5/7)+(-2,8)= (-4 5/14+3 10/14)-2 4/5= -1 5/14-2 4/5= -1 25/70-2 56/70= -3 81/70= -4 11/70 3) (-2/3+5/12)+(-0,45)= (-8/12+5/12)-9/20= -3/12-9/20= -15/60-27/60= -42/60= - 7/10 4) -3,7+(-5 11/30+3 4/15)= -3 7/10+ ( -5 11/30+3 8/30)= -3 7/10+(-2 3/30)= -3 7/10-2 1/10= -5 8/10= -5 4/5 5) (-0,6+2/3)+(-2 1/15)= (-3/5+2/3)-2 1/15= (-9/15+10/15)-2 1/15= 1/15-2 1/15= -2