## P3 Maths

### P3 Maths

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
OrangeBelt

Posts: 88
Joined: Wed Jan 26, 2011 9:18 pm
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### Re: P3 Maths

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
KiasuGrandMaster

Posts: 1269
Joined: Sun Sep 12, 2010 11:56 am
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### Re: P3 Maths

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
BlueBelt

Posts: 494
Joined: Thu Jun 25, 2015 5:15 am
Total Likes: 2

### Re: P3 Maths

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
BlackBelt

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### Re: P3 Maths

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
BlueBelt

Posts: 494
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