Q&A - P4 Math

[SAHM Chew]

fire_fly:

Hi, I need some help:


Angelia wanted to paste her stamps on a piece of rectangular paper measuring 33 cm by 14 cm. All the stamps used are similar in size measuring 4 cm by 3 cm. Assuming that she did not cut any of the stamps, what is the maximum number of stamps she can paste on the paper.

(Nanyang Pri School SA1 P4 Maths)

Let me try, paper length is 33cm, stamp length 4cm
33/4 =8 r1
Max 8 stamps

Paper Breadth 14cm, stamp breadth 3cm
14/3 = 4 r2
Max 4 stamps at the breadth.

8x4 = 32.

Max number of stamps =32.

[fire_fly]

SAHM Chew:

fire_fly:

Hi, I need some help:


Angelia wanted to paste her stamps on a piece of rectangular paper measuring 33 cm by 14 cm. All the stamps used are similar in size measuring 4 cm by 3 cm. Assuming that she did not cut any of the stamps, what is the maximum number of stamps she can paste on the paper.

(Nanyang Pri School SA1 P4 Maths)

Let me try, paper length is 33cm, stamp length 4cm
33/4 =8 r1
Max 8 stamps

Paper Breadth 14cm, stamp breadth 3cm
14/3 = 4 r2
Max 4 stamps at the breadth.

8x4 = 32.

Max number of stamps =32.

Hi, thank you so much for your answer. Is it also possible to find the entire area of the rectangular paper and divide it by the area of the stamps?

My son's solution was:

33x14 = 462
4x3 = 12
462/12 = 38R6
Hence, max. stamps = 38

[Oldschool]

fire_fly:

SAHM Chew:

[quote=\"fire_fly\"]Hi, I need some help:


Angelia wanted to paste her stamps on a piece of rectangular paper measuring 33 cm by 14 cm. All the stamps used are similar in size measuring 4 cm by 3 cm. Assuming that she did not cut any of the stamps, what is the maximum number of stamps she can paste on the paper.

(Nanyang Pri School SA1 P4 Maths)

Let me try, paper length is 33cm, stamp length 4cm
33/4 =8 r1
Max 8 stamps

Paper Breadth 14cm, stamp breadth 3cm
14/3 = 4 r2
Max 4 stamps at the breadth.

8x4 = 32.

Max number of stamps =32.

Hi, thank you so much for your answer. Is it also possible to find the entire area of the rectangular paper and divide it by the area of the stamps?

My son's solution was:

33x14 = 462
4x3 = 12
462/12 = 38R6
Hence, max. stamps = 38[/quote]
Hi,

No, because by doing so you will be cutting the stamp to fill the whole paper.

Regards

[MathIzzzFun]

fire_fly:

SAHM Chew:

[quote=\"fire_fly\"]Hi, I need some help:


Angelia wanted to paste her stamps on a piece of rectangular paper measuring 33 cm by 14 cm. All the stamps used are similar in size measuring 4 cm by 3 cm. Assuming that she did not cut any of the stamps, what is the maximum number of stamps she can paste on the paper.

(Nanyang Pri School SA1 P4 Maths)

Let me try, paper length is 33cm, stamp length 4cm
33/4 =8 r1
Max 8 stamps

Paper Breadth 14cm, stamp breadth 3cm
14/3 = 4 r2
Max 4 stamps at the breadth.

8x4 = 32.

Max number of stamps =32.

Hi, thank you so much for your answer. Is it also possible to find the entire area of the rectangular paper and divide it by the area of the stamps?

My son's solution was:

33x14 = 462
4x3 = 12
462/12 = 38R6
Hence, max. stamps = 38[/quote]Hi

in this case the total number is 38, obtained as follows

cut the 33cm x 14cm into 33 cm x 8 cm and 33 cm x 6 cm

for the 33 cm x 8 cm :
33 cm side --> 3 cm x 11
8 cm side --> 4 cm x 2
total --> 11 x 2 -> 22 stamps

for the 33cm x 6 cm
6 cm side --> 3cm x 2
33 cm side --> 4 cm x 8 .. left 1 cm --> 1 cm x 6 cm strip
total --> 2 x 8 = 16 stamps

so, total number of stamps --> 22 + 16 = 38

cheers.

Total

[intoxicated40]

pls help…


Matthias and hui min had 48 Pokemon cards. Matthias gave 1/2 of his pokemon cards to hui min. in return, hui min gave 2/5 of her total pokemon cards to Matthias. if they have the same number of pokemon cards now, how many pokemon cards did Matthias have at first?

thanks

[PapayaDad]

in the end

m=24
h=24

work backwards, h gave 2/5…so left with 3/5 = 24
1/5 = 8
5/5 = 40

h=40
m=8, m gave 1/2 left 8
so m have 16 at first

[intoxicated40]

PapayaDad:

in the end

m=24
h=24

work backwards, h gave 2/5....so left with 3/5 = 24
1/5 = 8
5/5 = 40

h=40
m=8, m gave 1/2 left 8
so m have 16 at first

you saved my day. thanks

[tracywham]

Hi, I need some help for the following questions:


(1) Ali, Ben and Charles had some marbles. Ali had 1/3 of the marbles.
Ben had 1/3 of the marbles. Charles had 210 marbles.
How many marbles did they have altogether?

(2) Caline had 120 beads at first. She gave 35 beads to Danny and a
number of Beads to Elle. Caline then had 1/3 of her beads left.
How many beads did Caline give to Elle?

Thank you in advance.

[Oldschool]

tracywham:

Hi, I need some help for the following questions:


(1) Ali, Ben and Charles had some marbles. Ali had 1/3 of the marbles.
Ben had 1/3 of the marbles. Charles had 210 marbles.
How many marbles did they have altogether?

(2) Caline had 120 beads at first. She gave 35 beads to Danny and a
number of Beads to Elle. Caline then had 1/3 of her beads left.
How many beads did Caline give to Elle?

Thank you in advance.

Hi

http://i39.tinypic.com/3587xxe.jpg\">

Regards

[PapayaDad]

(1) Ali, Ben and Charles had some marbles. Ali had 1/3 of the marbles.

Ben had 1/3 of the marbles. Charles had 210 marbles.
How many marbles did they have altogether?
Ali had 1/3
Ben had 1/3
So Charlier have the remainder which is also 1/3.
1/3 = 210
In total they have 210 x 3 = 630