Richard Chua
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

Need help. P6 question. Thanks a lot.

Replies 6
Lee Huei

1.potatoes mass added: 3.150kg 2. Carrots not sold : 2736g/2.736kg Correct?

6 years ago
Richard Chua

Sorry, I don't really understand your question.

6 years ago
Caleb Tey

Since 24% were potatos, this is the split 1,296.00 potatoes 24% 4,104.00 carrots 76% 5,400.00 Subsequently potatoes were increased to 52% ? potatoes 52% 4104 carrots 48% ? => 4104/48*52 = 4446 There are now 4446 g of potatoes. Potatoes increased by 4446-1296 = 3150g Carrots remain the same at 4104 g. 40% unsold = 40% *4104 = 1641.6 g unsold

6 years ago
Richard Chua

Thanks Caleb and Lee Huei

6 years ago
Lee Huei

Sorry, the unsold carrots should be 1641.6g I did wrong calculation :P fail p6 Liao

6 years ago
Richard Chua

Hehe😁. Thanks anyway

6 years ago

Lianawati Liu
Asked 9 years ago

SG chevron_right chevron_right

Thank you for adding me.

Replies 0

Adrian Ng
Asked 9 years ago

SG chevron_right Primary 5 chevron_right Number and Algebra

Making it visual...

Replies 1
Stella Lee

Thx

6 years ago

Vivian Ang
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Measurement

Please help.TIA

Replies 3
Zhong Shu Hao

Lol this Q...

6 years ago
Zhong Shu Hao

*Put in units yourself please* Volume in P = 60 x 32 = 1920 For every 1cm of water level in Q, there will be 2cm of water level in P. Let this total amount of water be 1 unit. Then in 1 unit, Volume of water in 1 unit = 60x2 + 40x1 = 120 + 40 = 160 Number of units = 1920/160 = 12 Water level in P = 12 x 2cm = 24cm

6 years ago
Soo Vei Li

Part (b): If height in P is 2h and height in Q is h, ratio of their volumes = 60*2h : 40*h = 3 : 1 1 unit of volume = 1920/4 = 480 Volume in P = 480*3=1440 Height in P = 1440/60 = 24 cm

6 years ago

Vivian Ang
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

Please help.TIA

Replies 4
Soo Vei Li

Suppose he paid all 9 notes in $10, he would have paid $90. The extra paid = 90-75=$15. Difference between the notes = $10-$5=$5. Extra paid divided by the difference between the notes (which is number that should be changed to $5 notes) = $15/$5= 3. It means that there are 3 $5 notes and 6 $10 notes.

6 years ago
Norizan Othman

Depending on the student's level .... Guess n chk may be easier 7x$10 1×$5 8 notes 6x$10 3×$5 9 notes

6 years ago
Lee Huei

Vei Li, what is the name of the method you use ?

6 years ago
Soo Vei Li

Supposition. Younger students may use guess-and-check. Once they have sufficient experience with guess-and-check, you can move them to these types of method.

6 years ago

About

Students

Tutors