Irene Ong
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Measurement

is this ans 37.68 or 75.36 cm2 for (b)

Replies 2
Alice Lieu

6 years ago
Irene Ong

Thanks

6 years ago

Irene Ong
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

Replies 5
Yeo See Yeong

6 years ago
Soo Vei Li

The model drawn by your child is a good start -- the model for C is correct. Modifying L's model will help: 120% can be represented as 5 units plus another unit (i.e., 6 units). Drawing this for L and then doing the same for C's model will show 24 units and the three 160. Therefore, 24units=2550-160-160-160. Perhaps, encourage him/her to correct C's model first and see if he/she can come up with the rest of the solution.

6 years ago
Soo Vei Li

I can also see that your child wrote 4u=2550-(160X3). That is also good thinking but he/she needs to think about how to represent the 120%. Making 120% as 1 unit does not allow us to work on C's model.

6 years ago
Kho Tek Hong

120% of L is 6 units if we take L as 5 units. In this case, 23 units = 2550-480=2070 1 unit = 90 Also, 120% means 120 units and 100% means 100 units. In this case, 460 units = 2550-480=2070 1 unit = 4.5 If 100% is 1 unit, then 120% is 1.2 units. In this case, 4.6 units = 2550-480=2070 1 unit = 450 If we take 120% as 1 unit, then 100% is 5/6 unit. In this case, 4 units + 5/6 unit = 2550-480=2070 1 unit = 540

6 years ago
Irene Ong

Thanks all

6 years ago

Irene Ong
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

Please help

Replies 3
Mike Tan

6 years ago
BA Poh Ann

6 years ago
Irene Ong

Thanks all

6 years ago

Vanitha Guna
Asked 9 years ago

SG chevron_right Primary 5 chevron_right Number and Algebra

Need help.

Replies 4
Koh Lay Koon

Use ratio. At first, BL:SL:TW:total = 1:2:4:7. Later, BL:SL:TW:total = 1:1:1:3. Make total the same. You should be able to solve.

6 years ago
KL Gan

Sorry for the mess. Hope it helps

6 years ago
Vanitha Guna

thanks all

6 years ago
Andrew Tham

6 years ago

Amy Choon
Asked 9 years ago

SG chevron_right Primary 5 chevron_right Number and Algebra

Need help on this P5 question. Thanks!

Replies 3
Soo Vei Li

Start by drawing a model of 5 units, showing 2 units going by bus. Next we can ask what we know about the remaining 3 units -- how do we subdivide 3 units into a ratio of 3:4 (total 7)? We do this by taking the LCM of 3 and 7 which is 21. How do we subdivide 3 units into 21 smaller units? We subdivide each of the 3 units into 7 smaller units to get a total of 21. After that compare the subdivided units of bus and private transport to see what number of equal units represents the 180.

6 years ago
Stella Lee

6 years ago
Amy Choon

Thanks all. That's very helpful!

6 years ago

About

Students

Tutors