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\\November 3, 2023 10:57 AM Surender Prajapati Proof 5 Reader _________________________ Date: ___________________74
(d) A government purchased 850725 bags of wheat. 408368 bags were sold in the
market. How many bags were left in their stock?
(e) A contractor purchased 650750 bricks for construction. 585051 bricks were used
in a building. How many bricks remained with the contractor?
(f) Anil invested `955890 in a business and Sunil invested `682580 in another
business. Who invested more money and by how much?
MULTIPLICATION TABLES UP TO 20
We have learnt the times tables of numbers of 2-20 in previous classes. Keeping it in our
mind makes calculation easier and faster. Hence, let us recall in once again.
Complete the multiplication tables given below.
× 1 2 3 4 5 6 7 8 9 10
2 6 16
3 3 15
4 16 36
5 10 30
6 42
7 21 56
8 8 40 80
9 36 81
10 20 70
11 66
12 36 96
13 65
14 14 140
15 60
16 32 144
17 102
18 36 72 144
19 19 133
20 60 200
MULTIPLICATION OF NUMBERS
Multiplication by 10, 100, or 1000,...
When a number is multiplied by 10, we put a zero to the right side of the number.
Examples: (a) 342 × 10 = 3420 (b) 5648 × 10 = 56480
When a number is multiplied by 20, 30, 40, ..., 90, we multiply the number by 2, 3, 4,
..., 9 respectively and put a zero to the right side of the product so obtained.
Examples: (a) 278 × 20 = 5560 (b) 3142 × 50 = 157100
36 Mathematics-5
