Important Questions for Class 6 Maths Knowing our Numbers

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Question 1
Solve the followings:
$5 (5 - 3)$
$20 ( 40 - 32)$
$(11 + 20)(31 + 30)$
$(1 + 6) + 10$
$2 \times (1 + 3) (10 + 12) \times (8 + 6)$ Question 2
Estimate the following products (by general rule):
(a) $271 \times 362$
(b) $5271 \times 3411$
(c) $32 \times 488$
(d) $451 \times 200$ 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 book store. 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? Question 11
77788 Successor is _______

Question 12
24747 is Predecessor of Predecessor of ______

Question 13
______ Successor is 10734

Question 14
_______ Predecessor is 25331

Question 15
53258 Successor is _________

Question 6
Write Roman Numerals for
(a) 49
(b) 78

Question 17 True and false statement
(a) Successor of a one digit number is always a one digit number.
(b) Successor of a 3-digit number is always a 3-digit number

Question 18
Find the following sum
a) $576875 + 576576 +654675$
b) $1734 + 620 + 803 +32$

Answer 2
Round off each factor to its greatest place
a. $300 \times 400 = 120000$
b. $5000 \times 3000= 15000000$
c. $30 \times 500= 15000$
d. $500 \times 2000=10000$ Answer 3
Use below steps to solve these
1. Examine the digit at tens place.
2. if the digit at tens place < 5, replace each one of the digits at tens and ones or units place by 0 and keep all other digits as they are.
If the digit at tens place $ \geq$ 5, increase the digit at hundreds place by 1 and replace each one of the digits at tens and ones place by 0.

6900

6300

400

100

100

200

100

7700

8300

1000

Answer 5
2959 Answer 6
4092 Answer 7
971276 Answer 8
24750 Answer 9
5694 Answer 10
(a) There are ten hundred thousands in one million
(b) 100 lakhs makes an crore