Q&A - P3 Math

[peggy]

jolenekoh:

Thank you


Mr. Siva has 240 pens. He has 25 more purple pens than black pens. He has 40 fewer red pens than black pens. How many red pens does he have?

Is the answer 45 ?

[jolenekoh]

peggy:

jolenekoh:

Thank you


Mr. Siva has 240 pens. He has 25 more purple pens than black pens. He has 40 fewer red pens than black pens. How many red pens does he have?

Is the answer 45 ?

Sorry...I don't have the answer woh :scratchhead:

[joeyphay]

25+25+40 =90

240-90 =150
150/3 = 50
Answer: 50 red pens

[smartmummy]

jolenekoh:

Thank you


Mr. Siva has 240 pens. He has 25 more purple pens than black pens. He has 40 fewer red pens than black pens. How many red pens does he have?

http://i39.tinypic.com/2v00487.png\">

[jolenekoh]

:thankyou: Smartmummy

smartmummy:

jolenekoh:

Thank you

Mr. Siva has 240 pens. He has 25 more purple pens than black pens. He has 40 fewer red pens than black pens. How many red pens does he have?

http://i39.tinypic.com/2v00487.png\">

[angel]

A group of 30 students attended a course.

18 of them attended the morning lesson and 24 of them attended the afternoon lesson. How many students attend both the morning and afternoon lessons?

[tianzhu]

angel:

A group of 30 students attended a course.

18 of them attended the morning lesson and 24 of them attended the afternoon lesson. How many students attend both the morning and afternoon lessons?

Hi

18 + 24 ----- 42

42 - 30 ----- 12

Number of students attending both sessions ----- 12

You may wish to draw a diagram. Here's an example for a similar question.

Hope this helps.

Best wishes

http://farm4.staticflickr.com/3440/3816681432_c7374ec2b2_z.jpg?zz=1\">

[angel]

tianzhu:

18 + 24 ----- 42

42 - 30 ----- 12

Number of students attending both sessions ----- 12
You may wish to draw a diagram. Here's an example for a similar question.
Hope this helps.
Best wishes

Thank Tianzhu

[ksoh3000]

Hi


Can anyone help to solve this problem ?

There are now 120 rambutans in two baskets. When 16 rambutans were transferred from the first basket to the second basket, the number of rambutans in the second basket was thrice the number of rambutans in the first one. How many rambutans were there in the second basket at first ?

Thank You

[tianzhu]

ksoh3000:

Hi


Can anyone help to solve this problem ?

There are now 120 rambutans in two baskets. When 16 rambutans were transferred from the first basket to the second basket, the number of rambutans in the second basket was thrice the number of rambutans in the first one. How many rambutans were there in the second basket at first ?

Thank You

Hi ksoh3000

You may use MD, but it might not be necessary.

In the end, the number of rambutans in the second basket was thrice (3 times) the number of rambutans in the first one.

First basket ------ 30 rambutans

Second basket ------ 90 rambutans

16 rambutans were transferred from the first basket to the second basket.

Therefore, there were 74 rambutans (90 - 16) in the second basket at first.

Hope this helps.

Best wishes