Vivi Zahlindah S'Wira
Asked 9 years ago

SG chevron_right Primary 5 chevron_right Number and Algebra

Can help me solve these questions pls?

Replies 4
Kim Soon Chin

6 years ago
Kim Soon Chin

6 years ago
Vivi Zahlindah S'Wira

Hi Kim Soon Chin thx for the help! Would like to seek clarifications on the answer for Q1 pls... could u kindly elaborate pls?

6 years ago
Kim Soon Chin

After selling 3/4 of cows, left 1/4 of cows. After selling 60% of goats, left 40% of goats, which is 2/5. Since amt left are equal, u can find the ratio of cows n goats initially, which is 8:5. U have another info given, total number is 5421. With the 2 info, u can calculate how many cows n goats.

6 years ago

Shanthi Seetharam
Asked 9 years ago

SG chevron_right Primary 4 chevron_right Fractions

Help to solve. Thks in adv.

Replies 3
Voon Jasmine

6 years ago
Yueh Mei Liu

6 years ago
Benny Teo

6 years ago

Jia Ying Sin
Asked 9 years ago

SG chevron_right Primary 5 chevron_right Fractions

P5 ques

Replies 2
Voon Jasmine

6 years ago
Jia Ying Sin

Tx :-D Voon Jasmine

6 years ago

Jamie Lee
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Fractions

Afternoon Teachers, please help my sister to check on her workings. Also she does not know the shortest method for the first qns .

Replies 4
Zhong Shu Hao

There are 2 cows for every 7 chickens present. If we let this combination be 1 unit, then in 1 unit, there will be: 2x4 + 7x2 = 22 legs Since there are 352 legs, there will be: 352/22 = 16units Since there are 5 more chickens than cows in 1 unit, then in 16units, there will be 16x5 = 90 more chickens than cows. (Answer)

6 years ago
Soo Vei Li

In Q6, the diagram your sister has drawn can be modified to represent the number of legs instead of number of animals: for chickens, draw 2 rows of 7 units; for cows, draw 4 rows of 2. There will be a total of 22 units to represent 352 legs (there are 22 legs in a group of 2 cows to 7 chickens). 1 unit = 16, which means there are 16 groups of 2 cows to 7 chickens. Each group has 5 more chickens, so 16 groups will have 16x5 = 80 more chickens. If your sister understands how to work out the number of legs in a group, the diagram is not really necessary. It might just help her visualize the problem better.

6 years ago
Soo Vei Li

Solution and reasoning for Q7 is correct 👍

6 years ago
Jamie Lee

Thanks

6 years ago

Wenxiang Huang
Asked 9 years ago

SG chevron_right chevron_right

Saw a post by one parent here, clarifying on the use of algebra in examinations. Was thinking of sharing on a new thread as parents may not have spotted the link below, in one of the replies. http://ifaq.gov.sg/MOE/apps/fcd_faqmain.aspx#FAQ_57882 It's best that when students attempt maths questions, they would have been well equipped with algebra and model method, so that they can choose which to apply. Regards, Eric Passioninlearning.wordpress.com

Replies 3
Izam Marwasi

Thanks for the link.. I agreed at this level algebra is not required... But if the child can understand algebra...it will help to solve the problem sums better.. I relate my case.. My elder daughter who took PSLE in 2011 was taught algebra and she did understand better than my 2nd daughter who is taking PSLE this year.. I did enquire the school why algebra was not taught to my daughter this year..the school says that not all students may comprehend algebra.. The school will only teach to some students (normally in the best class)... I would agree with the school on these... There is a difference between students capability.. and as you can see MOE also state that algebra is NOT required at this level..

6 years ago
Irene Kwek

Thank you for sharing!

6 years ago
Wenxiang Huang

Welcome

6 years ago

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