Advertisements
Advertisements
Question
First guess the answer and then calculate:
69 × 52 = ?
Solution
On guessing 69 × 52, the numbers will be near to 70 × 50 = 3500
Calculation-
| 60 | 9 | |
| 50 | 60 × 50 | 9 × 50 |
| 3000 | 450 | |
| 2 | 60 × 2 | 9 × 2 |
| 120 | 18 |
By adding the numbers in third and fifth rows you will get
3000 + 450 + 120 + 18 = 3588
So, 69 × 52 = 3588.
APPEARS IN
RELATED QUESTIONS
What about you? Do you also find Maths difficult?
If a person who runs a tea stall earns Rs 30 a day, how much will he earn in 10 days? And in a month? How did you get the answer? Discuss.
- Have you ever heard of someone taking a? For what?
- How much loan was taken?
- How much money was paid back?
In a week how much does Kiran earn from one rickshaw?
Do it mentally and write the answers.
| 2 × 6 = ______ | 4 × 80 = ______ |
| 20 × 6 = ______ | 4 × 81 = ______ |
| 2 × 60 = ______ | 9 × 25 = ______ |
| 3 × 42 = ______ | 31 × 9 = ______ |
Kiran has bought some junk from junk collectors.
Look at the rate list to see today's rates. Help Kiran to find out the cost of the junk.
| Rate-List | |
| Kind of Junk | Price of 1 kg |
| 1. Waste Paper... | Rs. 4/- |
| 2. Newspaper... | Rs. 5/- |
| 3. Iron... | Rs. 12/- |
| 4. Brass... | Rs. 170/- |
| 5. Plastic... | Rs. 10/- |
How much will Kiran pay for a 31 kg newspaper?
Kiran has bought some junk from junk collectors.
Look at the rate list to see today's rates. Help Kiran to find out the cost of the junk.
| Rate-List | |
| Kind of Junk | Price of 1 kg |
| 1. Waste Paper... | Rs. 4/- |
| 2. Newspaper... | Rs. 5/- |
| 3. Iron... | Rs. 12/- |
| 4. Brass... | Rs. 170/- |
| 5. Plastic... | Rs. 10/- |
Find the cost of 23 kg of waste paper.
| Dinu's Rate-List | |
| Kind of Junk | Price of 1 Kg |
| 1. Newspaper... | Rs. 6/- |
| 2. Iron... | Rs. 14/- |
| 3. Brass... | Rs. 180/- |
| 4. Plastic... | Rs. 12/- |
| 5. Water paper... | Rs. 4.50/- |
Kiran buys 1 kg iron for Rs 12 but sells it for Rs 14. How much does she earn when she sells 32 kg iron?
I bought 1 kg newspaper for Rs 5, but sold it for Rs 6. How much money did I earn by selling 152 kg of a newspaper?
How much money will Dinu pay for 4 kg brass?
