Revision 2

Revision 2 will cover the topics as follows:

1) Time
2) Length
3) Mass
4) Volume Of Liquid
5) Shapes & Space (3D and 2D)


Below are a few questions:

Q1) Raju took a bus ride at 10.00pm from Kelantan to Kuala Lumpur. The journey was 8 hours. What was the time when Raju reached Kuala Lumpur?

Q2) A pencil is 12cm long. A eraser is 3cm long. A ruler's length is equal to 2 pencil plus 2 eraser. What is the length of the ruler (in meter)?

Q3) Ahmad carries his goods in a bag. There are a Water Bottle (1 kg), a chocolate box (100 g), a tin of soft drink (300 g), a box of pencils (50 g), a bottle of jam (200 g), a set of painting tools (250 g) and a pack of sugar (200 g) in his bag. How many weight can Ahmad's bag carry?

Q4) Minah brought a 1.5 Litre bottle of soft drinks from a supermarket. She serves the soft drinks to her friends in cups. One cup can be filled with 150 ml. How many cups of soft drink can she serve to her friends?

Q5) Fill the Yellow Boxes in the picture below with the correct name of the Shapes:

Upon completing the questions, you may compare with the answers below:

Q1) 6.00am
Q2) 0.3 meter
Q3) 2.1 kg or 2100 g
Q4) 10 cups
Q5) Answer can be referred to the diagram below

That is all for revision. Thank you.

Revision 1

Revision will give a brief explanation to refresh you of the topics you learned.

Revision 1 will cover:

1) Addition
2) Subtraction
3) Multiplication
4) Division
5) Money

Below are a few questions for you:

Q1) 100 + 250 = ?
Q2) 51 + 32 + 77 = ?
Q3) 44 + 20 + 66 + 155 = ?

Q4) 800 - 300 = ?
Q5) 435 - 25 - 110 = ?
Q6) 650 - 65 - 75 - 230 = ?

Q7) 2 X 3 = ?
Q8) 4 X 5 = ?
Q9) 6 X 2 = ?

Q10) 4 ÷ 2 = ?
Q11) 9 ÷ 3 = ?
Q12) 12 ÷ 3 = ?

Q13) RM 10 + RM 20 = ?
Q14) RM 10 + RM 5 - RM 1 + 50 cents = ?
Q15) Johari has RM 10. If he buys a pencil for RM 1.20 (one ringgit and twenty cents), how much money he left?


The answer for each question are as below for you to compare.

Q1) 350
Q2) 160
Q3) 285
Q4) 500
Q5) 300
Q6) 280
Q7) 6
Q8) 20
Q9) 12
Q10) 2
Q11) 3
Q12) 4
Q13) RM 30
Q14) RM 14.50 (fourteen ringgit and fifty cents)
Q15) RM 8.80 (eight ringgit and eighty cents)

That is all for Revision 1. Thank you.

Shape & Space 2D - Characteristics

Like 3D Shapes, each 2D Shape also have their own characteristics.

The characteristics of each 2D shape are shown below:

Other interesting characteristics of the 2D Shapes are:

That is all for 2D Shapes. Thank you.

Shape & Space 2D - Introduction

We have learned about 3D shapes. Now we will learn about 2D shapes.

Notice that each shape have different sides.

The video below will help you learn 2D shapes in an easier way.

In the next posting, we will learn about 2D shapes' characteristics.

Thank you.

Shape & Space 3D - Characteristics

Each 3D shapes shown in the previous posting have its characteristics.

The diagrams below easily show the characteristics of each shape:

That is all for today. Thank you.

Shape & Space 3D - Introduction

Today, you will learn about shapes. There are many shapes as illustrated below:

For easy & fun learning, you can refer to the video below:

That is all for today. We will continue with their characteristics tomorrow.

Thank you.

Volume Of Liquid - Applying Volume

Similar to Mass and Length, Volume also have its units too.

The most common units are: Litre (L) and Millilitre (mL)

1 Litre (L) = 1000 Millilitres (mL)


In the picture below, there are 5 bottles.

The volume of Bottle 1 = 15 ml


The volume of Bottle 2 = 30 ml

The volume of Bottle 3 = 60 ml
The volume of Bottle 4 = 125 ml


The volume of Bottle 5 = 200 ml

Here are a few questions:
Q1) The volume of Bottle 3 is 60 ml. How many Bottles 1 are needed to achieve the same volume as Bottle 3?

Answer:
Bottle 3 = Bottle 1 X ?
60 ml = 15 ml + 15 ml + 15 ml + 15 ml

So, 4 Bottles 1 are needed to achieve the same volume as Bottle 3.

Q2) How many Bottles 5 are needed to achieve 1.2 Litres (l) ? [Note: 1 L = 1000 mL]

Answer:
Bottle 5 = 200 ml
1.2 L = 1200 ml

1200 ml = 200 ml + 200 ml + 200 ml + 200 ml + 200 ml + 200 ml

So, 6 Bottles 5 are needed to achieve 1.2 Litres.


Observe the picture below:

Label the volume of liquid for all the bottles (Green Bottle, Yellow Bottle, Red Bottle and Blue Bottle)

Answer:
Green Bottle = 400 ml
Yellow Bottle = 250 ml
Red Bottle = 1.5 l
Blue Bottle = 1 l

Thank you.

Volume Of Liquid - Introduction

Volume of liquid is the amount of space occupied by liquid.

For example, a bottle half filled with water, a tea pot fully filled with tea and others. These are volume.

(The empty spaces in this bottle can be filled by liquid)

(The volume is not necessarily the same for each bottle)




If an object (for example, a bottle) is big, it has more volume, so it can hold more amount of water.

Now, look at the picture below, if all bottles are filled with waters, which bottle has the most volume and which bottle has the least volume?

Answer:
The first bottle from left is the smallest, therefore, it has the least volume.

The last bottle from left is the biggest, so it has the most volume among all the bottles shown above.


In the next topic, we will discuss about the units of volume. Thank you.

Mass - Applying Mass

In previous entry, you have learned about Mass. Do you know we have units to measure Mass?

The basic unit for Mass is gram (g):

1 kilogram (kg) = 1000 gram (g)


There are many equipments to measure Mass. Some of these equipments are:

(Weight Balance)

(Triple Beam Balance)

 (Mechanical Scale)






Now, if a book is weighted at 50 grams while a brick is weighted at 200 grams. How many books are needed so that the weight is the same as a brick?

Solution:
1 Brick = 200 g
1 book = 50 g

50 g X ? = 200 g

50 g + 50 g + 50 g + 50 g = 200 g

So, it becomes:

50 g X 4 = 200 g

Answer:
4 books are needed to weight the same as a brick.


That's all for today. Thank you.

Mass - Introduction

Today we will learn about a new topic - Mass.

Mass is the amount of matter in an object. The more matter in an object, the heavier the object will be. The less matter in an object, the lighter the object will be.

For example:

Try to move a wooden table. After that try to move a wooden chair. Which one is easier to move?

It should be the wooden chair because the wooden table has more mass than a wooden chair.


Another example:

Try to lift a brick. After that, try to lift a small bag of sand. Which one is easier to lift?

It should be the small bag of sand because the small bag of sand is lighter than a brick.


Now you get the idea of mass and how to compare them. Before we end our lesson for today, look at the picture below. Which one has more mass? The stones or the water?

Answer: The Stones because in the picture shown, there Stones are heavier than the water. Hence, when Stones are heavier than water, this means stones have more mass than water.

That is all for today. Thank you.

Length - Applying Length

In the previous posting, you have learned about length. Now you will about units of length and how to apply them.

The units of length in this topic are: Meter (m), Centimeter (cm)

1 Meters (m) = 100 Centimeters (cm)

To convert an object with 3 meters of length into centimeters, you just need to multiply the number (in this case, 3) with 100. For example:

A length of a 'wau' is 1 meter. How long is the length of it in centimeters?
1m X 100 = 100cm

So, the 'wau' is 100 centimeters in length.


Now you try:

Imagine Ruler A is 1 meters long. Ruler B is half of the length of Ruler A. Ruler C is 30 centimeters.Between Ruler B and Ruler C, which one is longer?

Answer:

Ruler A is 1 meters long.
Ruler A: 1m X 100 = 100cm

Ruler B is half the length of Ruler A.
Ruler B: Length of Ruler A ÷ 2
Ruler B: 100cm ÷ 2 = 50cm

Ruler C is 30cm long.

So Ruler B is 50cm, Ruler C is 30cm.

Ruler B is longer.

That is all for today. Thank you.

Length - Introduction

Good day. Today, we will learn about length.

Length is the distance measured between two points.


To get a basic idea, compare a ruler and a pencil. Which one is longer?

VS

As you normally seen, a ruler is longer than the pencil. So we can say the length of the ruler is more than the pencil.

Height (tall) and length (long) are similar. To get the idea:
1) Try compare your height between you and your friends, see who is taller?

2) Look at your hand. Which of your finger is the longest?


Now look at the picture below:

Which mountain is the tallest?

            Left Mountain                                Center Mountain                                Right Mountain

Thank you.

Time - Applying Time

You have learned about Time.

Today, we will learn how to apply Time in our daily lives.

There are a few things you must know about Time:

1 Day = 24 Hours
* Notice the short needle will rotate from 0 to 12 for 2 rounds to reach 24 Hours

1 Hour = 60 Minutes
* The long needle will rotate from 0 to 12 for 1 round to reach 60 Minutes

1 Minute = 60 Seconds
* The red needle will rotate from 0 to 12 for 1 round to reach 60 Seconds


To apply Time in our daily lives, here is an example:
Kamal got onto a bus ride from his house to school at 6.50 o'clock. The journey took 20 minutes. What time Kamal reached the school?

     06 50
+   00 20
     06 70 - BUT 1 Hour = 60 Minutes
So: 07 10 - 70 Minutes - 60 Minutes = 10 Minutes

Answer: Kamal reached the school at 7.10 o'clock.

If Raju went into the shop at 9.55 and came out 10.05, how long was he in the shop?

     10 05
-    09 55
     00 10 - 1 Hour = 60 Minutes

Step by step answer:
     09 65
-    09 55
     00 10

Answer: Raju was in the shop for 10 minutes.

Remember the lesson well. Thank you.

Time - Introduction

Greetings. Today, we will learn about Time.

Time is a measuring system used to:
1) Sequence events (Past events, Present events, Future events)
2) Compare durations of events
3) Compare the intervals between 2 or more events


Look at the clock below:

The time shown in the above can be written as:
1) Fifteen minutes past one or;
2) One fifteen
3) 1.45 (in numbers)

Now you try to write the examples below:

We will learn more about time in the next posting. Thank you.

Money

Today's topic is Money

Our currency is Malaysian Ringgit (in English) or "Ringgit Malaysia" (in Bahasa Melayu).
Our coins are cents (in English) or "sen" (in Bahasa Melayu).

These are the samples of our money:

RM 1.00


RM 2.00


RM 5.00




RM 10.00


RM 50.00


RM 100.00


As for our coins, they are as follows:

From left:
1 cent (RM 0.01), 5 cents (RM 0.05), 10 cents (RM 0.10), 20 cents (RM 0.20) and 50 cents (RM 0.50)


To represent the value of RM 51.25 in RM and cents, they consist of:

1 X RM 50 note
1 X RM 1 note
1 X 20 cents
1 X 5 cents


To represent the value of RM 78.68 in RM and cents, they consist of:


1 X RM 50 note
2 X RM 10 note
1 X RM 5 note
3 X RM 1 note
1 X 50 cents
1 X 10 cents
1 X 5 cents
3 X 1 cent

Thank you.

Mathematics - Division ( 8 ÷ 2 = 4 )

Division is the fourth basics in mathematics.

How do you describe Division?

Imagine..
if c times b equals a, written:

c X b = a

where b is not 0, then a divided by b equals c, written:

 a ÷ b = c

a  = c
b

If a = 6, b = 3, c = ?
We have:

6  = c
3

c = 2 because:

2 X 3 = 6

In the above expression, a is called the dividend, b the divisor & c the quotient

The symbol of Division is:

Division can be illustrated as:

For the step of division, you can refer this link:
http://www.coolmath4kids.com/long-division/long-division-lesson-3.html

Thank you. We will move on to the next topic in my next posting.

Mathematics - Multiplication ( 2 x 3 = 6 )

Multiplication is another basics of mathematics. What is Multiplication?

Multiplication is the scaling one number by another. 

For example, 3 multiplied by 4 (often said as "3 times 4") can be calculated by adding 4 copies of 3 together:

3 X 4 = 3 + 3 + 3 + 3 = 12
3 X 4 = 12

Here 3 and 4 are the "factors" and 12 is the "product".

The symbol of Multiplication is:

( Often spelled as 'times' )


Here are the tables of Multiplication:

Now you try:
Imagine you have a bag of 3 stones

If you multiply ( X ) that bag with 4 times, how many stones would you have?

(After multiplication, you would have 4 bags)

Now you will have 4 bags with 3 stones in each bag.
So, after multiplication, you now have a total of 12 stones.

Mathematics - Subtraction ( 3 - 1 = 2 )

Subtraction is the second basics of mathematics. Subtraction is: A collection, take away (subtract) by a certain number of objects.

It's sign is Minus.

For example:

Five minus two equal to three
5 - 2 = 3

This can be shown in the picture on left:
There are 5 apples
Two apples are taken (marked with 'X')
So, we now have 3 apples






Now you try:
Look at the number of fruits in the picture below and write the numbers into the empty lines

Remember:

Subtraction is taking away a certain numbers from a given number.

Mathematics - Addition ( 1 + 1 = 2 )

It's a pleasure to write again. There are 4 basics in Mathematics:

English: Addition ( + ) / Bahasa Melayu: Penambahan ( + )
English: Subtraction ( - ) / Bahasa Melayu: Penolakan ( - )
English: Multiplication ( x ) / Bahasa Melayu: Pendaraban ( x )
English: Division ( ÷ ) / Bahasa Melayu: Pembahagian ( ÷ )

Today, we start with Addition

Addition is combining two collections of objects / numbers into one larger collection.

 
Below are the examples:

Remember:
Addition = Combining two collections of objects / numbers into one larger collection.