Regina Woo
Asked 9 years ago

SG chevron_right Primary 4 chevron_right Number and Algebra

Please help please

Replies 6
Pieter Cronje

80 -32=48. Then 48 must be devided by 2. So A is 24+32=56. Now cut off 50 from 56 and you left with 6 cm.

6 years ago
Pieter Cronje

6 years ago
Jason Oon

Hence, each packet of sugar is 2kg while each sack of rice is 10kg. 4 packets of sugar = 8kg 4 sacks of rice = 40kg Total = 48kg

6 years ago
Pieter Cronje

48

6 years ago
Jason Oon

Please post future questions in correct orientation. :)

6 years ago
Regina Woo

Sure sure.. Thank you so much

6 years ago

Regina Woo
Asked 9 years ago

SG chevron_right Primary 3 chevron_right Number and Algebra

Hi.. Can show me the workings to gets answer

Replies 1
Yeo See Yeong

6 years ago

Jade Apple
Asked 9 years ago

SG chevron_right Primary 5 chevron_right Fractions

Is the answer correct?

Replies 3
Maggie Lukes

I got the same answer.

6 years ago
Felicia Teo

Looks correct.

6 years ago
Jade Apple

Thanks all.👍

6 years ago

Angie Gigi
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Fractions

Replies 1
KL Gan

6 years ago

Angie Gigi
Asked 9 years ago

SG chevron_right Primary 5 chevron_right Number and Algebra

Pls help. P5 questions. Thanks.

Replies 5
Maggie Lukes

For the first question, I had trouble doing it with the modeling method, so I used algebra. 0.4A = .25B, so the ratio of A:B is 5:8. Multiply by 3 to get A:B = 15:24. C= 1/3B, so A:B:C=15:24:8. 50% of the pears in box B = 36 pears, which means B had 72 pears.72=24x3, so A had 15x3=45 pears and C had 8x3=24 pears. Altogether there were 45+72+24=141 pears.

6 years ago
Xavier Sng

Hello there Maggie ! So good to see you. You had the ratio nailed down 😀 and you can simply draw a model with that ratio....but you would have already realised that it isn't necessary. This is an instance where ratio is a more robust platform than a model. This is not to say that the model method is not good; I just believe that different questions require different tools for efficiency.

6 years ago
Xavier Sng

Question 13 3/5 of Ali = 1/2 of Ben 3/5 of Ali = 3/6 of Ben This tells us Ali had 5 units and Ben had 6 units initially. Caleb received a unit from Ali and had 4 units (2/3 of what Ben had). Total number of units = 4 + 6 + 4 units = 14 units 5/14 × 490 = 175

6 years ago
Angie Gigi

Thank you Maggie and Xavier!

6 years ago
Xavier Sng

The pleasure is mine. Regards

6 years ago

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