Q&A - P5 Math

[smartmummy]

rrjan:

Can someone kindly help me with this qn.


Another qn:
A shopkeeper had 377 pens n files. After he sold 4/7 of his pens and bought another 28 files, the umber of files he had became 2/3 the number of pens. How many files had he at first?

Let me try,
before
P[][][][][][][]
F[ ] ............... }Total of P&F 377

After
P[][][][][][][]
F[][] ................................ }Total of P&F 377+28=405
u=405/9=45
Ans=90-28=62

[PapayaDad]

At first pen is 7 unit; file is 377 - 7unit


then pen sold 4 unit left 3 unit; file is 377-7unit +28 = 2 unit

so 377+28 =9 unit

1 unit is 405/9=45

at first file is 377-7unit=377-315=62

[smartmummy]

PiscesLeo:

Another question:


Some old folks are sharing 2 bunches of grapes. If each of them eats 12 grapes, there will be 7 grapes short. If each of them eats 11 grapes, there will be 3 grapes extra. If one bunch of grapes has 19 fewer grapes, find the number of grapes in the larger bunch.

TIA

still u need help on this qn?
Pls refer page 177&178, similar qn done.......

[Maths Olympiad Tutor]

smartmummy:

Some old folks are sharing 2 bunches of grapes. If each of them eats 12 grapes, there will be 7 grapes short. If each of them eats 11 grapes, there will be 3 grapes extra. If one bunch of grapes has 19 fewer grapes, find the number of grapes in the larger bunch.TIA

If each person eats 12 grapes, they will be short of 7 grapes.
If each person eats 11 grapes, they have 3 extra.

This means there are 7 + 3 = 10 old folks altogether.

Total number of grapes = 11 x 10 + 3 = 113

1 bunch has 19 fewer grapes than the other bunch.

113 - 19 = 94

94 / 2 = 47

47 + 19 = 66

The larger bunch has 66 grapes.

Enjoy!

[PiscesLeo]

smartmummy:

PiscesLeo:

Another question:


Some old folks are sharing 2 bunches of grapes. If each of them eats 12 grapes, there will be 7 grapes short. If each of them eats 11 grapes, there will be 3 grapes extra. If one bunch of grapes has 19 fewer grapes, find the number of grapes in the larger bunch.

TIA

still u need help on this qn?
Pls refer page 177&178, similar qn done.......

Smartmummy, thanks again

[PiscesLeo]

Maths Olympiad Tutor:

smartmummy:

Some old folks are sharing 2 bunches of grapes. If each of them eats 12 grapes, there will be 7 grapes short. If each of them eats 11 grapes, there will be 3 grapes extra. If one bunch of grapes has 19 fewer grapes, find the number of grapes in the larger bunch.TIA

If each person eats 12 grapes, they will be short of 7 grapes.
If each person eats 11 grapes, they have 3 extra.

This means there are 7 + 3 = 10 old folks altogether.

Total number of grapes = 11 x 10 + 3 = 113

1 bunch has 19 fewer grapes than the other bunch.

113 - 19 = 94

94 / 2 = 47

47 + 19 = 66

The larger bunch has 66 grapes.

Enjoy!

Maths Olympiad Tutor, :thankyou:

[janicelhl]

May I check with the expert here. Is there any math book about solving problem sum?

[chloecube]

janicelhl:

May I check with the expert here. Is there any math book about solving problem sum?

My colleague bought this and said was very good.
i didnt buy bcos DS still have plenty of past yr exam paper and assessment book not done.

Title: Challenging Maths Problem made easy
Author: Ammiel Wan Chee Hong
Publisher : Marshall Cavendish Education

[Champion]

janicelhl:

May I check with the expert here. Is there any math book about solving problem sum?

I recommend the following book; my DD1 is using it in school
http://www.onsponge.com/index.php?option=com_flippingbook&view=book&id=4&tmpl=component

http://i48.tinypic.com/ddz5h0.jpg\">

[BigDevil]

Which is also by Ammiel Wan.


NickleBee Tutors also did a review of another Ammiel Wan's Math assessment http://www.kiasuparents.com/kiasu/forum/viewtopic.php?p=947458#p947458.