1.
=24km
₩₩₩₩₩₩₩
=-30ab
₩₩₩₩₩₩₩
=-24xy
₩₩₩₩₩₩₩
=0.3mn
₩₩₩₩₩₩₩
2.
=-1.8-10.2=-12
₩₩₩
=0.6
₩₩₩₩₩₩₩
3.
=-5x
₩₩₩₩
=-9a
₩₩₩₩
=26p
₩₩₩₩
=-16.2n
₩₩₩₩
=-4/9m
₩₩₩₩
=8/12a-2/12a+6/12a-1/12a=11/12a
₩₩₩₩₩₩₩₩₩
4.
=14x-21+12x-8=26x-29
₩₩₩
=-8k-16-15k+3=-23k-13
₩₩₩
=-16+16y+12-16y=-4
₩₩₩
=6x-22-20+15x=21x-42