One layer will contain
(18/3) × (9/3)
= 6 × 3
= 18 cubes
No. Of latter's =126/18 = 7 layers
So height= 7 x 3 = 21cm
6 years ago
Ngo Lilian
Asked 9 years ago
SG
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Primary 3
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Number and Algebra
Please help P3 question thank a lot
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2
Ng Sian Tee
7658-645-645 =
6 years ago
Ngo Lilian
Thank you
6 years ago
Stephanie Chan
Asked 9 years ago
SG
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Primary 4
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Number and Algebra
I need help.....
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10
Yueh Mei Liu
6 years ago
Yueh Mei Liu
Working is simple. But need to understand the thinking.
6 years ago
Seah Shirley
6 years ago
Stephanie Chan
For p3 wor, can have the "U"?
6 years ago
Soo Vei Li
A similar problem was posted a few days ago that you may want to look at as well. Solution below...
By reasoning:
After groups of 45 beads have been formed, there are 33 left.
To make the groups of 53 beads, we use the 33 extra to add 8 beads to the original groups of 45. In addition to the 33 extra beads, we also need 39 more.
That means the number of beads needed to add on to the groups of 45 = 33+39 = 72.
Since we are adding 8 beads per container, number of containers = 72/8 = 9.
6 years ago
Stephanie Chan
Faint... Thanks everyone!
6 years ago
Voon Jasmine
Excess + shortage question.
6 years ago
Pang Shing Hsiu
×6 6 12 18 24 30 36 42 48 54
+6 12 18 24 30 36 42 48 54 60
×8 8 16 24 32 40 48 56 64 72
-12 - 4 12 20 28 36 44 52 60
For a p3 child, you can use this method.
1st scenario is each child gets 6 choco bars, then it is multiples of 6 and add the 6 extra ones.
2nd scenario is each child gets 8 choco bars, there will be a shortage of 12 bars, you subtract from the multiples of 8.
At the 9th column, you see '60' repeated twice. This means there are a total of 60 choco bars. Since it appeared on the 9th column, there are 9 children.
It is excess / shortage Q but if the child is yet exposed to units, this method is clear.
Another way is Guess and Check. But tedious.
Hope it helps.
6 years ago
Serene Ong
Not sure if this explanation is easier to understand.
A)
6 choc each = balance 6
8 choc each = short of 12
Therefore to give 2 more chocolates to each student, teacher needs 12+6=18 more chocolates
18 chocolates / 2 each = 9 students
b) (9x6)+6 = 60 chocolates
6 years ago
Stephanie Chan
My hubby did this
6 years ago
Carol Ho
Asked 9 years ago
SG
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Primary 3
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Number and Algebra
Please help with P3 question. Thanks.
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2
Shaoyang Brandon
Hi, Carol. Refer to the image below for the solution. :)