Ребят помогите пж!по математике 6 класс веленкин.номера 1226 1227 1228

-24+(-16)+(-10)+23+17=-24-36+40=-60+40=-20
36+72+24-36-72-24=36-36+72-72+24-24=0
-3.4-7.7+4.2-8.9+3.5=-3.4-7.7-8.9+4.2+3.5=-20+7.7=-12.3
-3.9+8.6+4.7+3.9-4.7=8.6+4.7-4.7+3.9-3.9=8.6
4 2/7 - 3 2/9 - 5 5/7 + 1 1/3 - 5 1/9 +2 3/7=4 2/7-5 5/7+2 3/7-3 2/9-5 1/9=               =1- 8 1/3=-7 1/3
6 2/3 - 5 2/9 - 4 3/7 + 5 2/9 + 4 3/7 - 6 1/3=6 2/3-6 1/3+5 2/9 -5 2/9+4 3/7-4 3/7=1/3
1227
-36+m+24=m-12
n+42-13=n+29
5.7-7.7+a=-2+a
-0.44+x-0.22=-0.22+x
3/8-0.375+k=0.375-0.375+k=k
m+5/9-2/3=m-1/9
1228
-5*(-1.2)*(-7)=-42
-12.5*2.4*(-3)*(-5)=450
-5/7*3/8*1 2/5*(-2/3)=5/7*7/5*1/4=1/4
-0.7*(-2/9)*4.5*10=7/10*2/9*9/2*10=7