Q&A - P4 Math

[mrswongtuition]

millan:

just888:

Hi millan,


Since it is only 1 week to her exam. I would not encourage u to change her method which she is used to it. Else it may cause her to be confused and more pro to mistake. Maybe try to convert her during the sch holidays if u wish to?

thanks .. still thinking lor but really not sure why she thinks that way. I dbt teacher teach that way...

Did she learni abacus before? This method is the abacus method for multiplication of multiple digits.

It is easy to correct them. Be patient, show many examples, go through with her and watch her practise.

Hope you will be able to help her as the numbers do get larger as they progress in level.

Regards,
Mrs Wong
Tuition classes: http://www.mwtuition.blogspot.com
My personal blog: http://www.thelittleonesinmylife.blogspot.com

[raysusan]

There are some coins in a piggy bank.1/4 of them are 10-cent coins,5/8 of them are 20-cent coins and the rest are 50-cent coins.If their total value is $170,how many ten-cent coins are there in the piggy bank?


thank you in advanced
i am stuck at this question

[MathIzzzFun]

raysusan:

There are some coins in a piggy bank.1/4 of them are 10-cent coins,5/8 of them are 20-cent coins and the rest are 50-cent coins.If their total value is $170,how many ten-cent coins are there in the piggy bank?


thank you in advanced
i am stuck at this question

Hi

Total number of coins --> 8 units
10 cents coins --> 2 units --> $ 0.10 x 2 units = 0.2 units-dollar
20 cents coins --> 5 units --> $ 0.20 x 5 units = 1 units-dollar
50 cents coins --> 1 unit --> $ 0.50 x 1 unit = 0.5 units-dollar
total 1.7 units-dollar = $ 170, 1 unit --> 100
Number of 10 cents coins --> 2 units = 200

cheers.

[danishcookies]

This qustion is tricky to me. Pls help. Thanks


Initially Joshua the millionaire had 5 cars and 10 motorcycles. Then he bought more vehicles. He bought some vans and bicycles. There are now 95 vehicles and 260 wheels. how many cars, motorcycles, vans and bicycles are there now?

[MathIzzzFun]

danishcookies:

This qustion is tricky to me. Pls help. Thanks


Initially Joshua the millionaire had 5 cars and 10 motorcycles. Then he bought more vehicles. He bought some vans and bicycles. There are now 95 vehicles and 260 wheels. how many cars, motorcycles, vans and bicycles are there now?

Hi

Solve the 2nd part of the question as \"cows and chickens' type of question to find number of 2 wheeler & number of 4 wheeler. The difference with the original number will give the number of bicycles (2 wheeler) and vans (4 wheeler).

Number of 2 wheeler in the end = (95x4-260)/2 = 60,
so number of 4 wheeler in the end = 95 - 60 = 35

Number of vans bought = 35-5 = 30
number of bicycles bought = 60 - 10 = 50

cheers.

[Chongalicia]

thanks for sharing

[danishcookies]

many thanks for your help.

[ozora]

Hi all advisors,

need some help in this question.
I have some sweets. If I pack them in groups of 5, I will have 3 extra sweets. If I pack them in groups of 8, I will have 7 extra sweets. What is the min number of sweets do I have?
I used the following method and i got 23 but the answer key is 63 using the same method. why 63 and not 23?

Method :
x5 : 5, 10, 15, 20, 25, 30
----------------------------
+3: 8, 13 , 18, 23, 28, 33

x8: 8, 16, 24
-----------------
+7: 15, 23, 31

any advise?

[MathIzzzFun]

ozora:

Hi all advisors,

need some help in this question.
I have some sweets. If I pack them in groups of 5, I will have 3 extra sweets. If I pack them in groups of 8, I will have 7 extra sweets. What is the min number of sweets do I have?
I used the following method and i got 23 but the answer key is 63 using the same method. why 63 and not 23?

Method :
x5 : 5, 10, 15, 20, 25, 30
----------------------------
+3: 8, 13 , 18, 23, 28, 33

x8: 8, 16, 24
-----------------
+7: 15, 23, 31

any advise?

hi

u r right

there was a discussion on similar problem before, and here are my views on that question - http://www.flickr.com/photos/62167097@N02/5711589516/in/photostream

cheers.

[ozora]

MathIzzzFun:

ozora:

Hi all advisors,

need some help in this question.
I have some sweets. If I pack them in groups of 5, I will have 3 extra sweets. If I pack them in groups of 8, I will have 7 extra sweets. What is the min number of sweets do I have?
I used the following method and i got 23 but the answer key is 63 using the same method. why 63 and not 23?

Method :
x5 : 5, 10, 15, 20, 25, 30
----------------------------
+3: 8, 13 , 18, 23, 28, 33

x8: 8, 16, 24
-----------------
+7: 15, 23, 31

any advise?

hi

u r right

there was a discussion on similar problem before, and here are my views on that question - http://www.flickr.com/photos/62167097@N02/5711589516/in/photostream

cheers.

thanks MathIzzzFun.. thought my method is wrong. okie now get the idea