Advertisements
Advertisements
प्रश्न
First guess the answer and then calculate:
142 × 5 = ?
Advertisements
उत्तर
On guessing 142 × 5
The number will be near to 140 × 5 = 700
On calculation-
| 100 | 40 | 2 | |
| 5 | 100 × 5 | 40 × 5 | 2 × 5 |
| 500 | 200 | 10 |
By adding the numbers in the last row you will get
500 + 200 + 10 = 710
Hence, 142 × 5 = 710
APPEARS IN
संबंधित प्रश्न
What is the most difficult thing in your Maths book?
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?
Hariya and Babu want to buy a handcart for Rs 300.
 |
 |
Who has to pay back more - Hariya or Babu?
How Much does Kiran Earn from 9 Rickshaws in a Day?
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.
First guess the answer and then calculate:
69 × 52 = ?
First guess the answer and then calculate:
77 × 55 = ?
