一條數學(小6既)

A computer game costs $132.50. If Jordy saves $12.50 each day, how many days does he need to save enough money to buy the game? How much money has he left after buying it?

$132.5 除$12.5=10.6天，0.6不作一天，取一天，那即是11天。
11日來儲的錢有：11*12.5=$137.5。那比價錢多了：137.5-132.5=$5

問題主要是問所需日期及多餘的金錢，所以是兩道公式：

日期=所需價錢/每天所儲金錢

多餘的錢=日期*每天所儲金錢-所需價錢

132.5/12.5=$10.6
so,he need save money 11days.


after 11after he save money 11*12.5=$137.5

he left after after buying:
137.5-132.5=$5

電腦遊戲要$132.5,每日save$12.5
咁就要將132.5除12.5去計要儲幾耐錢
答案等於10.6日
四捨五入姐係11日
咁儲11日就會有$137.5,姐係夠錢買啦
咁將137.5減番132.5---5蚊就係佢剩番既錢

$132.5 / 12.5 = 10.6 days

$12.5*11-$132.5 = $ 5.00

ie, Jordy need 11 days & $5.00 will be left after purchase.