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Adrian Ng

Asked 9 years ago

SG Primary 4 Number and Algebra

Making it visual...

Replies 1

Geraldine Koh

Thank you Adrian Ng for yr help !

6 years ago

Maheswari Dineshraja

Asked 9 years ago

SG Primary 3 Number and Algebra

Need model diagram for this problem.. Pls help.. Thanks

Replies 3

Soo Vei Li

There's no need to use the model method for this question. After dividing into groups of 10 stamps with 9 left, Mr Tan can use the 9 leftovers to add 2 more stamps to each group to make 12. When he adds 2 to the first group, he will have 12 stamps with 7 left. But he'll have only 19 stamps which doesn't satisfy the condition. If Mr Tan has to use one of the groups of 10 to redistribute, he will have 19 to redistribute. To leave 7, he divides 12 among 6 groups. So, 12 stamps x 6 groups = 72 stamps. Including the 7 left, he has 79 stamps. Checking the answer: 79 can be divided into 7 groups with 9 left.

6 years ago

Maheswari Dineshraja

Thanks vei li soo

6 years ago

Ye Myat Aung

i dont know

6 years ago

Geraldine Koh

Asked 9 years ago

SG Primary 6 Number and Algebra

Hi, can someone please help with explanations and working? Tks in adv!

Replies 3

Xavier Sng

At 1430, the car had traveled 60km, meaning that both the car and lorry would have to cover 420 - 60 = 360 km in order to meet. The combined closing speed of the car and lorry was 60 + 120 = 180 km/h Time taken for both car and lorry to converge was 360 km ÷ 180 km/h = 2 hours 2 hours after 1430 was 1630.

6 years ago