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Question 11 Mark
Estimate the following products by rounding off each number to the nearest ten:
64 × 58
Answer
Nearest ten is 3600.
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Question 21 Mark
Write the corresponding numeral for the following:
2 × 10000000 + 5 × 100000 + 7 × 1000 + 9 × 100 + 5 × 1
Answer
2 × 10000000 + 5 × 100000 + 7 × 1000 + 9 × 100 + 5 × 1 = 2,05,07,905
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Question 51 Mark
Find the estimated quotient for the following:
83 ÷ 17
Answer
The estimated quotient for 83 ÷ 17 is approximately equal to 80 ÷ 20 = 8 ÷ 2 = 4.
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Question 61 Mark
Estimate the following products by rounding off the first number upwards and the second number downwards:
680 × 164
Answer
70000
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Question 71 Mark
What number must be subtracted from 11010101 to get 2635967?
Answer
The number is 11010101 - 2635967 = 8374134
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Question 81 Mark
A number exceeds 37684955 by 3615045. What is that number?
Answer
37684955 + 3615045 = 41300000
The number is 41300000.
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Question 91 Mark
Write the following numerals in words:
234,150,319
Answer
Two hundred thirty-four million one hundred fifty thousand three hundred nineteen.
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Question 101 Mark
Write the numeral for the following numbers:
Twenty lakh ten thousand eitht.
Answer
Twenty lakh ten thousand eitht = 2010008.
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Question 111 Mark
Find the estimated quotient for the following:
87 ÷ 28
Answer
87 ÷ 28 is approximately equal to 90 ÷ 30 = 3.
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Question 131 Mark
Write 'T' for true and 'F' for false.
100 lakhs make a million.
Answer
False.
Solution:
10 lakhs = 1 million.
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Question 151 Mark
A factory produces 6985 screws per day. How many screws will it produce in 358 days?
Answer
The screw mill produced 6985 × 358 = 2500630
2500630 screws were produced in 358 days.
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Question 161 Mark
From a cloth 5m long, a piece of length 2m 85cm is cut off. What is the length of the remaining piece?
Answer
The length of the remaining piece 5m 00cm - 2m 85cm = 2m 15cm.
The length of the remaining piece is 2m 15cm.
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Question 171 Mark
Write the following numbers in expanded form:
9,10,10,510
Answer
9,10,10,510 = (9 × 10000000) + (1 × 1000000) + (1 × 10000) + (5 × 100) + (1 × 10)
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Question 181 Mark
Write the numeral for the following numbers:
Six crore five lakh fifty-seven.
Answer
Six crore five lakh fifty-seven = 60500057.
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Question 191 Mark
Write the following numbers in expanded form:
15,768
Answer
15,768 = (1 × 10000) + (5 × 1000) + (7 × 100) + (6 × 10) + (8 × 1)
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Question 201 Mark
Estimate sum to the nearest thousand:
There are 54 balls in box A and 79 balls in box B. Estimate the total number of balls in both the boxes taken together.
Answer
Nearest thousand is 130.
Solution:
The total number of balls in the both boxes is 54 + 79 = 133 balls.
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Question 211 Mark
Estimate the following products by rounding off each number to the nearest ten:
28 × 63
Answer
Nearest ten is 1800.
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Question 231 Mark
Estimate the following products by rounding off each number to the nearest ten:
42 × 75
Answer
Nearest ten is 3200.
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Question 251 Mark
Fill in the following boxes with the correct symbol > or <:
$47893501\ \Box\ 47894021$
Answer
$47893501<47894021$
Solution:
Both the numbers have the same digits, namely 4, 7, 8 and 9, at the crores, ten lakhs, lakhs and ten thousands places, respectively.
However, the digits at the thousands place in 47893501 and 47894021 are 3 and 4, respectively.
Clearly, 3 < 4
$\therefore 47893501 < 47894021$
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Question 311 Mark
Write the numeral for the following numbers:
Fifty-four thousand seventy-three.
Answer
Fifty-four thousand seventy-three = 54073.
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Question 321 Mark
A rope of length 10m has been divided into 8 pieces of the same length. What is the length of each piece?
Answer
The length of each piece 10m ÷ 8 = 1m 25cm.
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Question 331 Mark
Estimate the following products by rounding off the first number downwards and the second number upwards:
578 × 369
Answer
200000
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Question 341 Mark
Estimate the following products by rounding off each number to the nearest hundred:
264 × 147
Answer
Nearest hundred is 30000.
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Question 401 Mark
Estimate the following products by rounding off each number to the nearest hundred:
376 × 123
Answer
Nearest hundred is 40000.
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Question 411 Mark
Estimate the following products by rounding off each number to the nearest ten:
15 × 34
Answer
Nearest ten is 600.
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Question 421 Mark
Estimate the following products by rounding off each number to the nearest hundred:
509 × 179
Answer
Nearest hundred is 100000.
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Question 431 Mark
Estimate the following products by rounding off the first number upwards and the second number downwards:
267 × 146
Answer
30000
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Question 441 Mark
Write the following numbers in words:
34,20,019
Answer
34,20,019 = Thirty-four lakh twenty thousand nineteen.
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Question 451 Mark
Write the following numbers in words:
6,18,05,008
Answer
6,18,05,008 = Six crore eighteen lakh five thousand eight.
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Question 461 Mark
If 36 flats cost Rs. 68251500, what is the cost of each such flat?
Answer
The cost of each such flat 68251500 ÷ 36 = 1895875.
The cost of each such flat 1895875.
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Question 501 Mark
Find the estimated quotient for the following:
868 ÷ 38
Answer
868 ÷ 38 is approximately equal to 900 ÷ 40 or 90 ÷ 4, which is approximately equal to 23.
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1 Mark Question - Maths STD 6 Questions - Vidyadip