1.1 The place value of digits in whole numbers  (Page 2/3)

Which of your numbers above is the largest number?

• Now write your numbers. Begin with the largest, then the next largest, then the next largest, until you reach the smallest. This is called DESCENDING ORDER. (Moses DESCENDED from the mountain)

D escending order is when you start with the largest number and go D own

Example: 10; 9; 8; 7; 6; 5; 4; 3; 2; 1

4.2 Ascending order is when you start with the smallest and go up! Now write your numbers in ascending order. Remember to begin with the smallest:

4.3 Write these numbers from the smallest to the largest:

6 095; 9 065; 6 059; 9 506; 5 069

4.4 Write these numbers from the largest to the smallest:

8 315; 3 851; 5 318; 1 853; 8 513

5. EVEN AND ODD NUMBERS

5.1 Study the number line below:

All the numbers that have been written there are even numbers. They can be shared equally between two friends.

5.2 Between the even numbers are odd numbers. They cannot be kept whole and shared equally between two people. Fill in the names of the odd numbers on the number line below:

TEST YOUR KNOWLEDGE of odd and even numbers

a. List the even numbers between 2 800 and 2 812

b. Which odd number is just before 10 000?

c. What is the first even number after 2 998?

6. LARGER AND SMALLER

LARGER THAN / SMALLER THAN

In Mathematics, this sign>means: LARGER THAN or GREATER THAN:

This sign<means: SMALLER THAN or LESS THAN

(Remember, the crocodile always opens his mouth towards the largest number because he is so hungry!)

500>400

or 500 is greater than 400

<500

or 400 is less than 500

TEST YOUR UNDERSTANDING OF THESE SIGNS:

• Fill in the correct sign from :<; =;>

a) 0  4 * 11 － 3

b) 13 － 6 * 0  7

c) 2  7 * 14 － 8

d) 13 － 5 * 7  4

6.2 Write down the missing number when you count in tens:

1 470<…… …………..<1 490.

7. CALCULATOR GAME

Now you may play another calculator game. Try to puzzle out what the learners are doing this time. Then play the game with your friend.

Paul keyed in 187. He keyed in one operator and pressed = and the number 1 870 appeared on the screen. What operator did he key in? Yes, it was: X 10 because 187 X 10 = 1 870.

What operator did Reyhana key in? Yes, it was also X 10 because 1 870 X 10 = 18 700.

8. Now see if you can complete this table without a calculator. Then check your answers with a friend. (If you get stuck you may use a calculator.)

1 6 329

Hello! I am called Six Thousand. I am part of a very large number, which is: Sixteen thousand three hundred and twenty-nine.

9. Now write down the value of the digit that has been printed in bold type:

3 421

8 035

9 2 6

1 4 051

Now let us look at the number 2 8 4 8 .

The 8 on the left means 800. The 8 on the right means 8.

What is the difference between the values of the two 8s?

800 － 8 = 792

10. Now calculate the difference between the value s of the numbers that have been made bold and underlined:

7 3 7 4

6 99 5

3 02 3

5 5 19

1 0 0 1 0

11. Now you may play a “place value” game with a friend and a calculator. This will strengthen your understanding of “place value”. It is important to play this game.