Zhe Xun's answer to Jai's Primary 6 Maths Singapore question.
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Date Posted:
3 years ago
why did you do 70 - 50 and divide by 2
Could you explain thoroughly
70-50 is the cookie difference from the first day and last day.
As cindy gives 2 more cookies away everyday, so we divide the total cookie diff(20) by the daily cookie diff(2) to find out the number of days
As cindy gives 2 more cookies away everyday, so we divide the total cookie diff(20) by the daily cookie diff(2) to find out the number of days
why did you do 70 + 10 then multiply by 3
could you also explain for the first part on the how many cookies rina had more the cindy
To get the original amt of cookies, we get Cookies left (70) + cookies she gave away, 10 days x cookies she gave away each day(3)
At the start rina and cindy both baked a different amount of cookies, but rina made 50 more cookies than cindy
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