From and slove 20 question how chapter Knowing our Numbers
Answers
Question 1
Solve the followings:
5 (5 – 3)
20 ( 40 – 32)
(11 + 20)(31 + 30)
(1 + 6) + 10
2 x (1 + 3) (10 + 12) x (8 + 6)
Question 2
Estimate the following products (by general rule):
a) 271 x 362
(b) 5271 x 3411
(c) 32 x 488
(d) 451 x 200
Question 3
Estimate the following (by rounding off to nearest hundreds):
(a) 6,941
(b) 6,320
(c) 416
(d) 126
(e) 109
(f) 202
(g) 146
(h) 7,684
(i) 8,311
(j) 986
Question 4
Estimate the following (by rounding off to nearest thousands):
(a) 2,456
(b) 1,810
(c) 25,564
(d) 7,210
(e) 6,499
(f) 62,535
Question 5
X and Y worked as salesperson at a bookstore. They sold 6283 story books in all. X sold 3324 story books. How many story books were sold by Y?
Question 6
A factory makes 132 machines per day. How many machines will the factory make in March?
Question 7
The population of a town was 9,75,689. In the first year it increased by 4563 and in the second year it decreased by 8976. What was the population of the town at the end of second year?
Question 8
If a table costs Rs 450 and a chair costs Rs 225, find the total amount needed to buy 30 table and 50 chairs. ?
Question 9
A Game zone was held for four days in a school. The number of tickets sold at the counter on the first, second, third and final day was respectively 1091, 1802, 1050 and 1751. Find the total number of tickets sold on?
Question 10
a) How many thousands make a million?
b) How many lakhs make a crore?
Answer 1
10
160
1891
17
2464
Answer 2
60000
15000000
12000
8000
Answer 3
6900
6300
400
100
100
200
100
7700
8300
1000
Answer 5
2959
Answer 6
4092
Answer 7
962150
Answer 8
686250
Answer 9
5694