Q&A - P3 Math

[yxl]

Miss Lim gives some erasers to her pupils. If she gives each pupil 6 erasers, there will be 5 left. If she gives each pupil 8 erasers, she will be short of 9. How many erasers does she have?







There were 1568 pupils in the hall. After 224 girls and 1/4 of the boys left the hall, there was an equal number of boys and girls remaining in the hall How many boys were there in the hall at first?

[tianzhu]

yxl:

1) Regina and Audrey went on a tour together. Regina bought 3 times as much money as Audrey. After Regina had spent $540 and Audrey spent $60, they had equal amount of money left. How much money had each of them left?

Hi

You may use MD or Units Method to solve this question.

A quick guide to draw the MD.

Draw 3 boxes to show Regina’s money and draw 1 box to show Audrey’s money.

Cut off 540 from Regina’s boxes and 60 from Audrey’s box leaving equal portion.

From MD, note that 2 boxes ------- 480
1 box ------ 240

Amount of money each of them left ------ 240 – 60 ------ 180.

Best wishes

[tianzhu]

yxl:

Miss Lim gives some erasers to her pupils. If she gives each pupil 6 erasers, there will be 5 left. If she gives each pupil 8 erasers, she will be short of 9. How many erasers does she have?

Hi

Look at this question from another angle, if Mrs Lim gives 2 more erasers(8-6) to her pupils, she would need (5+9) or 14 more erasers.

14/2 ------ 7
There are 7 pupils.

Number of erasers ------ (7*6) + 5 ------ 47 or (7*8) – 9 ------- 47

Best wishes

[tianzhu]

yxl:

There were 1568 pupils in the hall. After 224 girls and 1/4 of the boys left the hall, there was an equal number of boys and girls remaining in the hall How many boys were there in the hall at first?

Hi

A quick guide to draw the MD.

Draw 4 boxes to show the number of boys.
1/4 of the boys left the hall
Remaining number of boys ------- 3 boxes.

Remaining number of girls ------- 3 boxes.
At first, the number of girls ------- 3 boxes + 224

Hence, 7 units + 224 ------- 1568
1 unit ------ 192

Number of boys at first ------ 4 units ------768

Best wishes

[MathIzzzFun]

yxl:

Miss Lim gives some erasers to her pupils. If she gives each pupil 6 erasers, there will be 5 left. If she gives each pupil 8 erasers, she will be short of 9. How many erasers does she have?

Hi

A solution using MD. Hope this helps.

http://www.flickr.com/photos/62167097@N02/5661546018/in/photostream/

cheers.

[small]

MathIzzzFun:

yxl:

Miss Lim gives some erasers to her pupils. If she gives each pupil 6 erasers, there will be 5 left. If she gives each pupil 8 erasers, she will be short of 9. How many erasers does she have?

Hi

A solution using MD. Hope this helps.

http://www.flickr.com/photos/62167097@N02/5661546018/in/photostream/

cheers.

Hi,

Thanks for sharing the MD method.

[yxl]

Thanks for your help, Tianzhu :lol:

[tianzhu]

yxl:

Thanks for your help, Tianzhu :lol:

Hi

Good Morning.

You're welcome.

Best wishes

[mama_10]

appreciate if can help :?:


A, B,C & D tool turns to play badminton against one another. How many games would the 4 players play together?

:thankyou:

[mama_10]

hi tianzhu, thks !

:salute: