Q&A - P3 Math

[shurley197323]

A Kettle has 420ml more water than a jug. When 150ml of water is poured from the jug into the kettle,there are 4 times as much water in the kettle as the jug. How much water is there in the jug now ?

[femi]

femi:

hi need help, i does not know how to do this 2 question. hope u can help me to solve the questions thanks :lol:


question 1)Aminah and Shanthinee had 128 bookmarks altogether.Aminah gave 1/4of her bookmarks to geraldine. Shanthinee have the same number of bookmarks left. How many bookmarks had shanthinee have at first?

question 2)Mrs Raja gave 17 boys and girls a total of 105 clips. Each boy was given 5 clips and each girl was given 7 clips.If all the girls were to give all their clips to the boys, how many more clips would each boy get?


thanks for helping :celebrate: :?: :? :lol: :shock: :roll: :love: :!: :?:

[femi]

femi:

hi need help, i does not know how to do this 2 question. hope u can help me to solve the questions thanks :lol:


question 1)Aminah and Shanthinee had 128 bookmarks altogether.Aminah gave 1/4of her bookmarks to geraldine. Shanthinee have the same number of bookmarks left. How many bookmarks had shanthinee have at first?

question 2)Mrs Raja gave 17 boys and girls a total of 105 clips. Each boy was given 5 clips and each girl was given 7 clips.If all the girls were to give all their clips to the boys, how many more clips would each boy get?


thanks for helping :celebrate: :?: :? :lol: :shock: :roll: :love: :!: :?:

[femi]

femi:

hi need help, i does not know how to do this 2 question. hope u can help me to solve the questions thanks :lol:


question 1)Aminah and Shanthinee had 128 bookmarks altogether.Aminah gave 1/4of her bookmarks to geraldine. Shanthinee have the same number of bookmarks left. How many bookmarks had shanthinee have at first?

question 2)Mrs Raja gave 17 boys and girls a total of 105 clips. Each boy was given 5 clips and each girl was given 7 clips.If all the girls were to give all their clips to the boys, how many more clips would each boy get?


thanks for helping :celebrate: :?: :? :lol: :shock: :roll: :love: :!: :?:

[Jennifer]

Draw a model for the before transfer of water from jug to kettle


_____ 420ml
_____

150ml transferred from jug to kettle will result in the model changed to

150 420 150


The original _____ now split into __ +150 for kettle

so 150 + 420 + 150 = 720 will be divided by 3 (the difference between the kettle and jug)

Jug has 240ml

[tianzhu]

[quote]2)Mrs Raja gave 17 boys and girls a total of 105 clips. Each boy was given 5 clips and each girl was given 7 clips.If all the girls were to give all their clips to the boys, how many more clips would each boy get? [/quote]
Hi
Hope this helps.

You may use a heuristics known as Making a Supposition or Assuming Method.

Suppose all the 17 pupils are girls.

17*7 = 119
119 – 105 = 14 (fewer clips)

Each boy has 2 fewer clips.
Number of boys = 14/2 = 7

Number of girls = 10
Number of clips held by girls = 7*10 = 70

Hence each boy will get 70/7 = 10 clips (more)

Best wishes

[tianzhu]

[quote])Aminah and Shanthinee had 128 bookmarks altogether.Aminah gave 1/4of her bookmarks to geraldine. Shanthinee have the same number of bookmarks left. How many bookmarks had shanthinee have at first? [/quote]
Hi

Are the bookmarks given to Geraldine or Shanthinee?

Please confirm if the numbers are 128 and 1/4.

Best wishes

[WS1234567]

jedamum:

ChiefKiasu:

From Ai Tong Pri 3 SA1 Maths:


A teacher gave her students some balloons. If she gave 6 balloons to each student, she will have 2 balloons left. If she gave 8 balloons to each student, she will be short of 2 balloons. What is the smallest possible number of students she has?

I'll probably use trial and error method and hope that she is not giving out >100 balloons. :lol:
Ans: 2 students...correct?

The question can be solved easily using logic. This is how I explain to my students:

If the teacher gives 6 ballons to each student, she will have 2 left. When she gives two more to each one, she not only uses up the 2 she had left previously, she is going to need 2 more. So, she needs 4 more to make it happen. In that case, she must have given to 2 students since 2 x 2 =4. I prefer to train logic. It makes the kids stronger fundamentally.
Anyway, model-drawing and listing can solve the question too.

Therefore, my working is:
8-6=2
2+2=4
4 divided by 2=2 (students) (answer)

[bookwormkids]

Muffins:

hi bookwormkids, this has a multitude of answers. Maybe the book just picked one of those. Examples of answers would be: 115, 226, 337, 448, 559

Hi Muffins

This was a 2009 SA1 question taken from Maha Bodhi :roll:

Thank you so much for your reply

[tianzhu]

shurley197323:

A Kettle has 420ml more water than a jug. When 150ml of water is poured from the jug into the kettle,there are 4 times as much water in the kettle as the jug. How much water is there in the jug now ?

Hi

Good Morning

This question has been discussed in one of the earlier posts in the P3/P4 Maths thread.

Please follow this link @ page 47.

http://www.kiasuparents.com/kiasu/forum/viewtopic.php?t=149&postdays=0&postorder=asc&start=460

Best wishes