Page 20 - Maths Skill - 3

18 Maths

Example 2: Write the following numbers in standard form.
(a) 8000 + 700 + 50 + 6 (b) 3000 + 50 + 1

Solution: (a) Standard form of 8000 + 700 + 50 + 6 = 8756

(b) Standard form of 3000 + 50 + 1 = 3051

Exercise 2.4

1. Write the following numbers in expanded form.
(a) 6342 = + + +

(b) 2108 = + + +

(c) 9126 = + + +

2. Write the following numbers in standard form.
(a) 3000 + 400 + 0 + 8 = Challenge
I am a four digit number that end
(b) 2000 + 300 + 50 + 5 = with the digit 0.

(c) 4000 + 0 + 10 + 2 = I am the smallest four-digit number.
What number am I?
Comparison of Numbers

We compare numbers to know which number is greater and which is smaller.

To compare numbers with different numbers of digits

A number containing more digits is always greater.

To compare numbers with same numbers of digits

Step 1: Start comparing the first digit from the left in each number.
Step 2: The number having greater digit is greater.

Step 3: If both the digits are same, then move to the second digit from the left and
so on.

Let’s Attempt

Example 1: Compare the numbers 996 and 1039.

Solution: 996 is a 3-digit number while 1039 is a 4-digit number.

H T O Th H T O
9 9 6 1 0 3 9

Thus, 996 < 1039