Page 21 - Viva

Example 13: Round off (a) 6253 and (b) 7923 to the nearest 1000.

Solution: (a) 6253 is rounded off to 6000 since the digit at the hundreds place is 2.

(b) 7923 is rounded off to 8000 since the digit at the hundreds place is 9.

Exercise 1.4

1. Fill in the blanks.

(a) The smallest 4-digit number is ______________.

(b) The largest 4-digit number is ______________.
(c) To make the largest number from the given set of numbers, you write them in
______________ order.

(d) To make the smallest number from the given set of numbers, you write them
in ______________ order.

2. Write the largest and the smallest 4-digit numbers that can be formed using the
given digits (without repeating any digit).
Largest Number Smallest Number

(a) 2, 8, 5, 1

(b) 4, 0, 7, 9

(c) 8, 3, 2, 0

3. Form the largest and the smallest 4-digit numbers using the given digits by
repeating the smallest digit twice.

Largest Number Smallest Number

(a) 2, 0, 6

(b) 9, 1, 6

(c) 8, 0, 9

4. Form all possible 4-digit numbers using the given digits and conditions.
(a) 5, 0, 6 and 7 with 5 not at the tens place.

(b) 9, 3, 5 and 6 with 3 not at the ones place.

(c) 1, 4, 8 and 7 with 8 at the hundreds place.

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