Page 36 - Start Up Mathematics_5

Example 19: Find the following products. Working

(a) 9,356 × 1,000 (b) 1 1 (c) 2 3 5 1 4
(b) 17,215 × 2,000 1 7 2 1 5 2 4 5 9 1 7
(c) 2,45,917 × 6,000 × 2 × 6

(d) 34,228 × 9,000 3 4 4 3 0 1 4 7 5 5 0 2

Solution: (a) 9,356 × 1 000 = 93,56,000 (d) 3 2 2 7
3 4 2 2 8
(b) 17,215 × 2 000 = 3,44,30,000 × 9

(c) 2,45,917 × 6 000 = 1,47,55,02,000 3 0 8 0 5 2

(d) 34,228 × 9 000 = 30,80,52,000

Mental Maths

Find the product.
(a) 9,64,999 × 100 (b) 31,241 × 5,000 (c) 22,211 × 7,000

Division

You have already learnt to divide 3-digit and 4-digit numbers by 1-digit and 2-digit numbers.
Now we will learn to divide 5-digit, 6-digit and 7-digit numbers by 2-digit, 3-digit and 4-digit
numbers.
Before we begin, let’s revise the properties of division.

Properties of division

1. Any number divided by itself gives 1.

For example, 7,624 ÷ 7,624 = 1; 4,30,179 ÷ 4,30,179 = 1
2. Any number divided by 1 gives the number itself.

For example, 8,275 ÷ 1 = 8,275; 6,34,11,832 ÷ 1 = 6,34,11,832

3. Zero divided by any number, results in zero.
For example, 0 ÷ 2,435 = 0; 0 ÷ 17,436 = 0

4. A number cannot be divided by 0.

For example, 3,795 ÷ 0 is not defined.
Mental Maths

(a) 8,247 ÷ 1 = _____ (b) 6,31,452 ÷ 0 = _____

(c) 91,268 ÷ 91,268 = _____ (d) 0 ÷ 3,71,462 = _____
(e) 7,14,365 ÷ 1 = _____

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