Question - 1 Estimate the following by rounding off each number to its greatest place:
(1) 439 + 334 + 4, 317
(11) 8, 325 - 491
(m) 1,08, 734 - 47, 599
(iv) 898 x 785
(v) 9 x 795
(vi) 87 317
(vii) 5,290 + 17.986
(VIN) 4.89.348 - 48,934
Answers
Given: a. 439 + 334 + 4, 317
b. 8, 325 - 491
c. 1,08, 734 - 47, 599
d. 898 x 785
e. 9 x 795
f. 87 317
g. 5,290 + 17.986
h. 4,89,348 - 48,934
To find: Estimate the following by rounding off each number to its greatest place.
Solution:
a. 439 + 334 + 4,317 = 5090
Rounding off to its greatest place = 5000 (round of to thousands)
b. 8, 325 - 491 = 7834
Rounding off to its greatest place = 8000 (round of to thousands)
c. 1,08, 734 - 47, 599 = 61135
Rounding off to its greatest place = 60000 (round of to ten thousands)
d. 898 x 785 = 704930
Rounding off to its greatest place = 700000 (round of to lakhs)
e. 9 x 795 = 7155
Rounding off to its greatest place = 7000 (round of to thousands)
f. 87 x 317 = 27579
Rounding off to its greatest place = 30000(round of to ten thousands)
g. 5,290 + 17,986 = 23276
Rounding off to its greatest place = 20000(round of to ten thousands)
h. 4,89,348 - 48,934 = 440414
Rounding off to its greatest place = 400000(round of to lakhs)
Answer:
So we have rounded off all the numbers to the highest place.
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