Math topic中文

Meeting and catch-up problems

Meeting: distance sum = speed sum x time; catch-up: distance gap = speed gap x time.

Learn these first

Distance = speed × time

Practice questions

  1. 1Annie and Bonnie are running laps around a 400-meter oval track. They started together, but Annie has pulled ahead becau…
  2. 2甲乙两人练习赛跑，甲每秒跑7米，乙每秒跑6.5米，甲让乙先跑5米，设x秒后，甲可以追上乙，则下列方程不正确结果是（ ） A. 7x=6.5x+5 B. 7x-5=6.5 C. （7-6.5）x=5 D. 6.5x=7x-5
  3. 3Miguel is walking with his dog, Luna. When they reach the entrance to a park, Miguel throws a ball straight ahead and co…
  4. 4一天24小时中，时钟的分针和时针共组合成 次平角， 次周角．
  5. 5A bus takes 2 minutes to drive from one stop to the next, and waits 1minute at each stop to let passengers board. Zia ta…
  6. 6已知：数轴上AA、BB两点表示的有理数为aa、bb，且(a−1)2+∣b+2∣=0(a-1)^{2}+|b+2|=0． (1)A(1)A、BB各表示哪一个有理数？ (2)点CC在数轴上表示的数是cc，且与AA、BB…
  7. 7The one-way routes connecting towns A,M,C,X,YA, M, C, X, Y , and ZZ are shown in the figure below (not drawn to scale). The di…
  8. 8Two towns, AA and BB, are connected by a straight road, 15 miles long. Traveling from town AA to town BB, the speed…
  9. 9Bella begins to walk from her house toward her friend Ella's house. At the same time, Ella begins to ride her bicycle to…