Răspuns:
4) 10+8:( 86-78)= 10+8: 8=11
20-9:(98-89)=20-9:9=21
20:10=2+9=11
10× 100-200=1000-200=800
8×98-84= 874
3)238+548-492=294
384-164-120=100
282+492+548=1322
492-282+548=758
5)900:2=450m
