Q&A - P4 Math

[peapot]

I don’t know. It’s school homework which she needs to submit on Monday. I don’t have the answer. Pls advise.

[captainavenger]

Hi everyone,could help me :


1) A pendulums swings to and fro in 1 seconds. It makes angle of 53 degrees. How many degrees does the pendulum swing in 5 seconds.


thank you in advance for the input :?

[Funz]

I try.


PS is 1/6 of PQRS which is the perimeter. So perimeter will be 6/6

PS = QR = 1/6

So PQ = SR = 2/6

PQ - PS = 2/6 - 1/6 = 1/6 = 6cm

So PQRS is 6x6cm = 36 cm

PS = 6cm, PQ = 12 cm
Area of rectangle is 6x12 = 72cm sq
Shaded area = 56cm sq
so unshaded area = 72 - 56 = 16cm sq

[tankee]

5 x 2 x 53 = 530 degrees

[peapot]

Oh I c! Now I understand. Thks so much!!

[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)

[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.

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