KSEEB Solutions for Class 6 Maths Chapter 1 Knowing Our Numbers Ex 1.3

Students can Download Chapter 1 Algebra Ex 1.3 Questions and Answers, Notes Pdf, KSEEB Solutions for Class 6 Maths helps you to revise the complete Karnataka State Board Syllabus and score more marks in your examinations.

Karnataka State Syllabus Class 6 Maths Chapter 1 Algebra Ex 1.3

Question 1.
Estimate each of the following using general rule:
a. 730 + 998
b. 796 – 314
c. 12,904 + 2,888
d. 28,292 – 21,496
Make ten more such examples of addition, subtraction and estimation of their outcome.
a. 730 + 998 :-
By rounding off to hundreds, 730rounds off to 7.00 and 998 rounds off to 1000
KSEEB Solutions for Class 6 Maths Chapter 1 Knowing Our Numbers Ex 1.3 1
The addition of these two number is 1700.

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b. 796 – 314
By rounding off to hundreds, 796 rounds off to 800 and 314 rounds off to 300
KSEEB Solutions for Class 6 Maths Chapter 1 Knowing Our Numbers Ex 1.3 2
Total 500
The difference of these two number is 500.

c. 12,904 + 2,888:-
By rounding off to thousands, 12904 rounds off to 13000 and 2822 round off to 3000
KSEEB Solutions for Class 6 Maths Chapter 1 Knowing Our Numbers Ex 1.3 3
The addition of these two number is 16,000.

d. 28,292 – 21,496:-
By rounding off to nearest thousands, 28296 rounds off to 28000 and 21496 rounds off to 21000
KSEEB Solutions for Class 6 Maths Chapter 1 Knowing Our Numbers Ex 1.3 4
The difference of these two numbers is 7000.

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Question 2.
Give a rough estimate (by rounding off to nearest hundreds) and also a close estimate (by rounding off to nearest tens):
a. 439 + 334 + 4317
b. 1,08,734 – 47,599
c. 8325 – 491
d. 4,89,348 – 48,365
Solution:
a. 439 + 334+ 4317:-
Rounding off to nearest hundreds, 439, 334 and 4317 may be sounded may be rounded off to 400, 300 and 4300 respectively.
KSEEB Solutions for Class 6 Maths Chapter 1 Knowing Our Numbers Ex 1.3 20
Rounding off to nearest tens, 439, 334 and 4317 may be rounded off to 440, 330 and 4320 respectively
KSEEB Solutions for Class 6 Maths Chapter 1 Knowing Our Numbers Ex 1.3 21

b. 1,08,734 – 47,599
Rounding off to hundreds, 108,734 and 47,599 may be rounded off to 1,08,700 and 47.600 respectively
KSEEB Solutions for Class 6 Maths Chapter 1 Knowing Our Numbers Ex 1.3 22
Rounding off to tens 1,08,734 and 47,599 may be rounded off to 1,08,730 and 47,600 respectively
KSEEB Solutions for Class 6 Maths Chapter 1 Knowing Our Numbers Ex 1.3 23

c. 8325 – 491:-
Rounding off to hundreds 8325 and 491 may be rounded off to 8330 and 490 respectively
KSEEB Solutions for Class 6 Maths Chapter 1 Knowing Our Numbers Ex 1.3 24

d. 4,89,348-48,365:-
Rounding off to hundreds, 489348 and 48365 may be rounded off to 489300 and 48400 respectively
KSEEB Solutions for Class 6 Maths Chapter 1 Knowing Our Numbers Ex 1.3 25
Rounding off to tens 489348 and 48365 may be rounded off to 489350 and 48370 respectively
KSEEB Solutions for Class 6 Maths Chapter 1 Knowing Our Numbers Ex 1.3 26

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Question 3.
Estimate the following products using general rule:
a. 578 × 161
b. 5281 × 3491
c. 1291 × 592
d. 9250 × 29 make four more such examples.
Solution:
For the following roundoff nearly Thousand & Hundreds
a. 578 × 161
Rounding off by general rule, 598 and 161 may be rounded off to 600 and 200 respectively
KSEEB Solutions for Class 6 Maths Chapter 1 Knowing Our Numbers Ex 1.3 201
OR
600 × 200 = 1,20,000
∴ Product Estimation = 1,20,000

b. 281 × 3491
Rounding off by general rule, 5281 and 3491 may be rounded off to 5000 and 3000 respectively
KSEEB Solutions for Class 6 Maths Chapter 1 Knowing Our Numbers Ex 1.3 212
5000 × 3000 = 15000000
OR
∴ Product Estimation = 15000000

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c. 1291 × 592
Rounding off by general rule, 1291 and 592 may be rounded off to 1000 and 600 respectively.
KSEEB Solutions for Class 6 Maths Chapter 1 Knowing Our Numbers Ex 1.3 222
OR
1000 × 600 = 600000
∴ Product Estimation = 6,00,000

d. 9250 × 29
Rounding off by general rule, 9250 and 29 may be rounded off to 9000 and 30 respectively
KSEEB Solutions for Class 6 Maths Chapter 1 Knowing Our Numbers Ex 1.3 232
OR
9000 × 30 = 270000
∴ Product Estimation = 2,70,000

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