Q&A - P5 Math
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sembgal:
Mrs Tan bought 42 apples. Each apple costs $0.70 less than a pear. She spent the same amount of money on 12 pears. How much did Mrs Tan spend on buying the apples?
Please help to solve. Thanks.
cost of 12 pears = cost of 42 apples
cost of 1 pear = 7/2 x cost of 1 apple
cost of 1 pear --> 7 units
cost of 1 apple --> 2 units
5 units --> $0.70
1 unit --> $0.14
cost of 1 apple --> $0.28
Amount paid for the apples = 42 x $0.28 = $11.76
cheers. -
Man_at_work:
question is incomplete.. here's the approach to obtain the each's share of the marbles :
Please, anybody can help? Thanks in advanceMan_at_work:
Can anyone help me with this problem? Many thanks!
4 children Amos, Bala, Chris and Darren, each have some marbles. The number of marbles that Amos has is 1/2 of the total number of marbles that Bala, Chris and Darren have. The number of marbles that Chris has is 1/4 of the total Amos,Bala and Darren have. The number of marbles that Bala has is 2/3 of the total number of marbles that Amos, Chris and Darren have.
Amos's marbles --> 1/3 of total number -- Amos -> 1part, Bala+Chris+Darren-> 2parts, total -> 3 parts
Chris's marbles --> 1/5 of total number
Bala's marbles --> 2/5 of total number
1-1/3 -1/5-2/5 = 1/15
Darren's marbles --> 1/15 of total number
I believe you can work from here ..
cheers. -
Pls help to solve this question.
In a stadium, the number of girls is equal to the number of men. There are 252 females altogether. 7/9 of the children and 2/3 of the adults are females.
(a) Find the number of girls.
(b) Find the difference in the number of children and adults.
[Please use model approach]
TIA -
2Transformer:
(you can translate the solution to model easily)Pls help to solve this question.
In a stadium, the number of girls is equal to the number of men. There are 252 females altogether. 7/9 of the children and 2/3 of the adults are females.
(a) Find the number of girls.
(b) Find the difference in the number of children and adults.
[Please use model approach]
TIA
using equal fraction method:
7/9 children (girls) = 1/3 adults (men)
7/9 children = 7/21 adults
children --> 9 units, ----- girls : boys --> 7 units : 2 units
adults --> 21 units, ----- women : men --> 14 units : 7 units
Total number of females --> 21 units
21 units --> 252
1 unit --> 12
number of girls --> 7 x 12 = 84
Difference in number of adults and children --> (14 - 2) x 12 = 144
there are 144 more adults than children.
cheers. -
MathIzzzFun:
:thankyou: MathIzzzFun !
(you can translate the solution to model easily)2Transformer:
Pls help to solve this question.
In a stadium, the number of girls is equal to the number of men. There are 252 females altogether. 7/9 of the children and 2/3 of the adults are females.
(a) Find the number of girls.
(b) Find the difference in the number of children and adults.
[Please use model approach]
TIA
using equal fraction method:
7/9 children (girls) = 1/3 adults (men)
7/9 children = 7/21 adults
children --> 9 units, ----- girls : boys --> 7 units : 2 units
adults --> 21 units, ----- women : men --> 14 units : 7 units
Total number of females --> 21 units
21 units --> 252
1 unit --> 12
number of girls --> 7 x 12 = 84
Difference in number of adults and children --> (14 - 2) x 12 = 144
there are 144 more adults than children.
cheers. -
jieheng:
Thanks.
1A + 0.7 = 1Psembgal:
Mrs Tan bought 42 apples. Each apple costs $0.70 less than a pear. She spent the same amount of money on 12 pears. How much did Mrs Tan spend on buying the apples?
Please help to solve. Thanks.
12A + 12*0.7 = 12P
12A + 8.4 = 12P
12A + 8.4 = 42A (the cost of 42 apples = the cost of 12 pears)
30A = 8.4
1A = 0.28
42A = 0.28*42 = 11.76
the amount of money she spent on buying the apples is $11.76 -
MathIzzzFun:
Thankssembgal:
Mrs Tan bought 42 apples. Each apple costs $0.70 less than a pear. She spent the same amount of money on 12 pears. How much did Mrs Tan spend on buying the apples?
Please help to solve. Thanks.
cost of 12 pears = cost of 42 apples
cost of 1 pear = 7/2 x cost of 1 apple
cost of 1 pear --> 7 units
cost of 1 apple --> 2 units
5 units --> $0.70
1 unit --> $0.14
cost of 1 apple --> $0.28
Amount paid for the apples = 42 x $0.28 = $11.76
cheers. -
Alternative Method - (some students may find it easier to understand with a simple "box" model):
You can draw a box picture (which I can’t here) to show as follows:-
Cost of 1 Apple = 1 unit
Cost of 1 Pear = 1 unit + $ 0.70
Cost of 42 Apples = 42 units
Cost of 12 Pears = 12 units + 12 x $ 0.70 = 12 units + $ 8.40
put the two box models, one on top of the other, and the student will see clearly
30 units = $ 8.40
1 unit = $ 0.28
42 units = $ 11.76
Mrs Tan spent $ 11.76 on the apples.
Best Regards,
iCreative Math -
Is iCreative Math related to iCreative Learners?
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No. Not Related.
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