Q&A - P3 Math

[Cher2101]

Hi there


can show the model drawing for this question again.

Ray and Jim had an equal amount of money. Ray spent $85 on the watch and Jim spent $189 on a camera. As a result, Ray had thrice as much as money as Jim had left. How much money did each of them have at first?

thanks in advance

[SAHM Chew]

Cher2101:

Hi there


can show the model drawing for this question again.

Ray and Jim had an equal amount of money. Ray spent $85 on the watch and Jim spent $189 on a camera. As a result, Ray had thrice as much as money as Jim had left. How much money did each of them have at first?

thanks in advance

http://i42.tinypic.com/34g10nk.jpg\">

[Cher2101]

I dun understand why 2 units = 189-85

[SAHM Chew]

Cher2101:

I dun understand why 2 units = 189-85

From the model,

2 units + watch = camera
2 units + $85 = $189
Therefore, 2 units = $189 - $85.

[Cher2101]

Wow thank you… Think my gal will have hard time understand the concept.


Infact I was using my method to teach her,

Rey: A-85=3x
X=(A-85)/3
Jim : A-189=x
A-189=(A-85)/3
(A-189)*3=A-85
3A-567=A-85
3A-A=567-85
2A=482
A=241


No wonder her mouth open so big

[SAHM Chew]

Wahh, your method looks chim to a p3 kid. How old is your girl?

Cher2101:

Wow thank you... Think my gal will have hard time understand the concept.

Infact I was using my method to teach her,

Rey: A-85=3x
X=(A-85)/3
Jim : A-189=x
A-189=(A-85)/3
(A-189)*3=A-85
3A-567=A-85
3A-A=567-85
2A=482
A=241


No wonder her mouth open so big

[2snoopy]

SAHM Chew:

peapot:

sorry to bother but I need to know how to draw the box model for Nancy.


Helen had twice as much money as Simon.
Nancy had $120 less than Helen.
The 3 persons had $380 altogether.
How much did Simon have?

I know how to draw the box model for both Helen and Simon but stump at Nancy's box. Can someone help me? Thanks in advance.

http://i39.tinypic.com/9iwu0y.jpg\">

How do you know to draw Nancy's $120 less for the box in the model is more than 1unit and not smaller than 1unit?

[plum-cake]

what is 5 four equal to?

1)5x5x5x5
2)5+5+5+5
3)4+4+4+4+4
4)4x4x4x4

[SAHM Chew]

2snoopy:

SAHM Chew:

[quote=\"peapot\"]sorry to bother but I need to know how to draw the box model for Nancy.


Helen had twice as much money as Simon.
Nancy had $120 less than Helen.
The 3 persons had $380 altogether.
How much did Simon have?

I know how to draw the box model for both Helen and Simon but stump at Nancy's box. Can someone help me? Thanks in advance.

http://i39.tinypic.com/9iwu0y.jpg\">

How do you know to draw Nancy's $120 less for the box in the model is more than 1unit and not smaller than 1unit?[/quote]Actually, i do not know whether to draw it bigger or smaller than 1 unit when i started doing the model. cos $120 can be anywhere. i do the amendment after i get the ans. This is what i teaches my boy too.. to look at the model to make sure that the model is correct after the final ans. But boys..... i am sure he will not check.

[SAHM Chew]

plum-cake:

what is 5 four equal to?

1)5x5x5x5
2)5+5+5+5
3)4+4+4+4+4
4)4x4x4x4

5 four should be 5 groups of 4, as taught in my boy's textbook.

Therefore, the ans should be Ans 3.