P3 Maths

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P3 Maths

Postby Bunny27 » Fri Apr 24, 2015 6:41 pm

Hi,
I need help on this question. Can someone help as I need to explain to my gal?

1. Ali has a total of $76. Some are $2 notes and the rest are $5 notes. He has 4 more $5 notes than $2 notes. How many $2 notes and $5 notes does Ali have?

Thank you!

Bunny27
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Re: P3 Maths

Postby alfretztay » Fri Apr 24, 2015 7:00 pm

Bunny27 wrote:Hi,
I need help on this question. Can someone help as I need to explain to my gal?

1. Ali has a total of $76. Some are $2 notes and the rest are $5 notes. He has 4 more $5 notes than $2 notes. How many $2 notes and $5 notes does Ali have?

Thank you!


4 more $5 notes -> $20
(? x $2) + (? x $5) + $20 = $76
$2 + $5 = $7
? -> ($76 - $20)/$7 = 8
8 + 4 = 12

Ans : 8 $2 notes and 12 $5 notes.

alfretztay
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Re: P3 Maths

Postby Swift Formula » Sun Jun 28, 2015 6:49 am

Bunny27 wrote:Hi,
I need help on this question. Can someone help as I need to explain to my gal?

1. Ali has a total of $76. Some are $2 notes and the rest are $5 notes. He has 4 more $5 notes than $2 notes. How many $2 notes and $5 notes does Ali have?

Thank you!


Take out $2 and $5. Set a simple question. Using 2 and 3 as answer.
Ali has $19, some are $2, some are $5. He has 1 more $5 note than $2 note.
Once solved, increase 2 and 3 to 4 and 7 then 14 and 19.

In case u need help to solve question or show working.
$76 - 4x $5 = $56. (Remove 4x extra $5, so same amount of $2 and $5 notes)
$2+$5 = $7 (1 group of $2 and $5 = $7, group them so can find number of groups)
$56 / $7 = 8 (groups of $2 and $5, there 8x$2 and 8x$5, don't forget 4 extra $5 subtracted earlier on)
8 + 4 = 12

Swift Formula
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Re: P3 Maths

Postby Blue Pearl » Wed Aug 05, 2015 4:44 pm

Swift Formula wrote:
Bunny27 wrote:Hi,
I need help on this question. Can someone help as I need to explain to my gal?

1. Ali has a total of $76. Some are $2 notes and the rest are $5 notes. He has 4 more $5 notes than $2 notes. How many $2 notes and $5 notes does Ali have?

Thank you!


Take out $2 and $5. Set a simple question. Using 2 and 3 as answer.
Ali has $19, some are $2, some are $5. He has 1 more $5 note than $2 note.
Once solved, increase 2 and 3 to 4 and 7 then 14 and 19.

In case u need help to solve question or show working.
$76 - 4x $5 = $56. (Remove 4x extra $5, so same amount of $2 and $5 notes)
$2+$5 = $7 (1 group of $2 and $5 = $7, group them so can find number of groups)
$56 / $7 = 8 (groups of $2 and $5, there 8x$2 and 8x$5, don't forget 4 extra $5 subtracted earlier on)
8 + 4 = 12



Do we need to draw model for this type of question? Is it a must. Will teacher deduct marks if children did not draw model. Thank you.

Blue Pearl
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Re: P3 Maths

Postby Swift Formula » Wed Aug 05, 2015 10:23 pm

PSLE markings is based on understanding of the question .

If his/her workings and methods can solve the question and have proof of understandings, it will be accepted .

Model is encourage to help students to visualise only .

Swift Formula
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