(10+8)*3=10*3+8*3=30+24=54
(40+6)*2=40*2+6*2=80+12=92
(7+8)*3=7*3+8*3=21+24=45
Диагональ
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6km=600000sm
3dm 40mm=34sm
6m 8dm 2sm=682sm
650mm=65sm
5dm 3sm=53sm
1m 14sm=114sm
36000mm=3600sm
8m=800sm
2m 8sm=208sm
5/15=1/3 6/20=3/10 14/35=2/5 21/39=7/13 10/60=1/6 28/84=1/3 56/72=7/9 20/25=4/5
1)141*304*2000:4000=42864*5=24320