Đáp án+Giải thích các bước giải:
184 12 giờ hay 11 giờ 60 phút
+ - -
1987,53 5 giờ 30 phút 5 giờ 30 phút
··················· ······································ ·····································
2171,53 6 giờ 30 phút
36,27 22 giờ 12 phút : 3
x 1 giờ=60 phút 7 giờ 24 phút
5,7 ································
················· 72 phút
25389 12
18135 0
····················
206,739