幫下我lo!靚仔靚女~~

1)Cities A and B are 987km apart.The upper limit of the speed on a highway between the two cities is 110km/h.


1)城市A和B是987km單獨。速度的上限在一條高速公路在二個城市之間是110km/h.

(a)Estimate the minimum time taken from city A to city B.


(a)估計從城市花費的極小的時間A對城市B。




(b)If Mrs.Wong and her family starts from city A at 8:00a.m.,could she invite her friends at city B for dinner dinner at 6:00 p.m.?



(b)如果夫人。Wong和她的家庭開始從城市A在8:00 a。m.，可能她邀請她的朋友在城市B為晚餐晚餐在6:00 p。m. ？




2)Estimate the result of subtracting the sum of 502 and 796 from 1997.



2)估計減去總和的結果的502和796從1997年。

1)(a)The minimum time taken from city A to city B
=( 987/110 )h
=8.9727h
(b)Yes , she can.

2) 1997-( 502+796 )
(similar to)2000--( 500+800 )
=700

(1)(a)987KM / 110km/h = 8.9727 h
(b)yes ,she can
(2) 2696

2007-03-04 17:34:49 補充：
(2) 1997-(5 02 796)=699