Page 16 - ICSE Math 5

Example 5: Write the standard form of the following.
(a) 4 crores + 2 ten lakhs + 3 lakhs + 4 ten thousands + 1 thousand + 5 tens + 4 ones

(b) 8,00,00,000 + 40,00,000 + 40,000 + 200 + 70 + 3

Solution: (a) 4,23,41,054 (b) 8,40,40,273

Exercise 1.2

1. Write the face value and the place value of the underlined digits in the following
numbers.
(a) 85,43,715 (b) 26,07,539 (c) 97,42,313 (d) 82,05,35,444

2. Find the sum and the difference of the place values of the underlined digits in the given
numbers.

(a) 85,43,65,930 (b) 29,82,43,926 (c) 9,16,48,532 (d) 14,83,16,526
3. Write the following numbers in expanded form.

(a) 85,34,917 (b) 3,72,05,415 (c) 7,82,54,251 (d) 18,71,32,815

4. Write the following in standard form.
(a) 8,00,00,000 + 70,00,000 + 4,00,000 + 10,000 + 3,000 + 500 + 80 + 2

(b) 4 crores + 3 ten lakhs + 7 lakhs + 6 ten thousands + 2 thousands + 5 hundreds
+ 1 ten + 3 ones
(c) 2 ten crores + 3 crores + 4 lakhs + 7 ten thousands + 5 hundreds + 6 tens + 2 ones

(d) 8 ten lakhs + 3 lakhs + 4 ten thousands + 2 thousands + 7 hundreds + 2 tens + 3 ones
Predecessor and Successor

The predecessor of a number is obtained by subtracting 1 from it while the successor of a number
is obtained by adding 1 to it.
The predecessor of 3,42,13,211 is 3,42,13,211 – 1 = 3,42,13,210.
The successor of 3,42,13,211 is 3,42,13,211 + 1 = 3,42,13,212.

Comparison of Numbers

While comparing numbers, remember the following points.
• A number which has more digits is always greater. For example, 22,29,432 > 2,49,807.

• If two numbers have the same number of digits, always start comparing from the extreme
left digit, i.e., the highest place value and then move towards the right to the smaller place
values.
• If the extreme left of two numbers are the same, then move towards the right to compare
the next digits and so on.

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