1 ) Two boats set off at 20 km/h southwards and 18 km/h towards north respectively .How far apart are they after 90 munutes?
2) A and B had a race. They ran at 7 m/s and 6 m/s respectively. How far apart were they after 2 minutes?
幫忙數學題列式
2007-08-03 8:53 pm
回答 (2)
2007-08-03 8:58 pm
✔ 最佳答案
a) (20+18) x 1.5 = 57kmb) (7 - 6) x 120 = 120m
2007-08-03 8:59 pm
1 ) Two boats set off at 20 km/h southwards and 18 km/h towards north respectively .How far apart are they after 90 munutes?
(20+18)*1.5
=38*1.5
=57km
2) A and B had a race. They ran at 7 m/s and 6 m/s respectively. How far apart were they after 2 minutes?
(7-6)*(2*60)
=1*120
=120m
(20+18)*1.5
=38*1.5
=57km
2) A and B had a race. They ran at 7 m/s and 6 m/s respectively. How far apart were they after 2 minutes?
(7-6)*(2*60)
=1*120
=120m
參考: me
收錄日期: 2021-04-23 17:11:57
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