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phungnana
2 năm trước
Đổi các vận tốc sau: v1 = 50m/phút = ........................ cm/s v2 = 260m/phút = ............ ............cm/s v3 = 156 m/phút = ......................km/h v4 = 1,8km/min = ............ ............m/s v5 = 5,8 m/min = ..................... cm/s v6 = 1,8 km/h = .................... m/min v7 = 25 dm/s = ............................m/s v8 = 12 m/h = ........................cm/min
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