Q&A - P3 Math

[angel]

Hi experts, I've a question. Can you help?


Betty baked some cookies. After giving away 72 cookies, and baking another 94 cookies, she had 250 cookies left. How many cookies did Betty bake at first?

My answer is 228 but model answer is 322. Kindly explain to me.

Thank you very much.

[ksoh3000]

HI


Can anyone help in solving this qn ?

28 chess mathces were played at a chess tournament. If each player was allowed to play only once with each other player, how many players were there altogether ?

Tks

[PapayaDad]

B-72+94=250

B=250+72-94=228

[Betty baked some cookies]…at first
[Betty give 72][seventy.two]…give 72
[Betty give 72][seventy.two][22]…bake 72+22 (bake 94)
<---------250---------->…left 252
[—156----][seventy.two]…250-22-72=156
[Betty baked some cookies]…at first there are 156 + 72 = 228

[PapayaDad]

ksoh3000:

HI


Can anyone help in solving this qn ?

28 chess mathces were played at a chess tournament. If each player was allowed to play only once with each other player, how many players were there altogether ?

Tks

2 player = 1 match
3 player = 3 match (2+1)
4 player = 6 match (3+2+1)
5 player = 10 match (4+3+2+1)
6 player = 15 match (5+4+3+2+1)
7 player = 21 match (6+5+4+3+2+1)
8 player = 28 match (7+6+5+4+3+2+1)

[ksoh3000]

Hi PapayaDad


Thank You

[angel]

PapayaDad:

B-72+94=250

B=250+72-94=228

[Betty baked some cookies]..................at first
[Betty give 72][seventy.two]..................give 72
[Betty give 72][seventy.two][22]............bake 72+22 (bake 94)
<---------250---------->............left 252
[---156----][seventy.two]..................250-22-72=156
[Betty baked some cookies]..................at first there are 156 + 72 = 228

Thank you very much.

[jolenekoh]

Appreciate for the help


Mr. Thomas placed a row of flowerpots alont the path from the gate to the door of his bungalow. There were 18 flowerpots alont the path. A flowerpot was placed at every 5 m. How long was the path from the gate to the door?



Thank you in advance

[fann]

Hihi,

Can anyone help to solve this question?

The cost of a pen and a pencil is $2.50. The cost of 2 such pens is the same as the cost of 3 such pencils. What is the cost of 5 such pencils?

[SignorWinter]

fann:

Hihi,

Can anyone help to solve this question?

The cost of a pen and a pencil is $2.50. The cost of 2 such pens is the same as the cost of 3 such pencils. What is the cost of 5 such pencils?

Cost of 2 pens = cost of 3 pencils
Cost of 1 pen = cost of 3/2 pencils

Hence with 2.50 you can buy 5/2 pencils. ( 1 + 3/2 = 5/2)

2.50/5 x 2 = 1 = cost of pencil
1 x 5 = 5

[Oldschool]

jolenekoh:

Appreciate for the help


Mr. Thomas placed a row of flowerpots alont the path from the gate to the door of his bungalow. There were 18 flowerpots alont the path. A flowerpot was placed at every 5 m. How long was the path from the gate to the door?



Thank you in advance

Hi,

I assume that the first pot start from the gate and the last pot end exactly at the door or vice versa.

Then the path is 17 x 5 = 85m.

This can be illustrated with a ruler to your kid.
e.g. Starting from 0 to 10cm, if the point is 1cm apart then there are a total of 11 points.

Regards