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Friday, November 24 2017 @ 10:36 AM CST
 Forum Index >  Test Paper Related >  Primary 5 Matters
 P5 Maths - Average Question
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By: veronica2566 (offline)  Friday, February 25 2011 @ 08:21 PM CST (Read 2841 times)  
veronica2566

Hi

Another average question for P5 :

Ques : Vincent's average savings for the first 6 months of the year was $120.
If he had saved $100 in Jan, his average savings would have been $115.
How much did he actually save in Jan?

Thanks!

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By: sokechan (offline)  Monday, February 28 2011 @ 06:35 AM CST  
sokechan

Jan - Jun -> 120 x 6 = 720
100 ( New Jan ) - Jun -> 115 x 6 = 690
720 - 690 = 30
30 + 100 = 130

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By: tanhuimin (offline)  Saturday, March 26 2011 @ 08:52 AM CDT  
tanhuimin

This is just to share with everyone the tip I just learnt from School's teacher.
using of ":" colon, "," comma, "->" arrow, in the presentation of working is not accepted in PSLE.
should use "----"

Eg.
total saving from Jan to Jun ----- 120 x 6 = 720
save $100 in Jan, total saving ----- 115 x 6 = 690
720 - 690 = 30
30 + 100 = 130

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