kak tolong ya, no 1-6

1.-4+(-40)=(-44)
2.-10+30=20,30:2=15°
3.4/5=0,8
6/9=0,666
5/7=0,714
j=5/7,6/9,4/5
4.300x1/3=100,300x1/4=75,300x1/4=60
T=235
J=300-235
=65 m persegi
5.S=80:5=16km
=1:1.600.000 cm
6.15 l=180 km
5 l=180:3=60 km
20 l=240 km