4. Give a rough estimate (by rounding off to
nearest hundreds) and also a closer
estimate (by rounding off to nearest tens):
(i) 439 + 334 + 4317 (ii) 108734 - 47599
(iii) 8325 - 491
(iv) 489348 - 48365
5. Find the estimated sum and difference of
the following:
(i) 5290 + 17986 (ii) 5673 - 436
(iii) 13805 + 2868 (iv) 48457 - 23624
6. Find the estimated products and quotients
of the following:
(1) 958 X 387 (0) 4295 + 7
(iii) 858 * 487 (iv) 1254 + 10
Answers
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1
Answer:
4 .
(i)
Rough estimate :
400+300+4300
5000
Closer Estimate :
440+330+4310
= 5080
(ii)
Rough estimate :
5700-400
=5300
Closer Estimate:
5670-440
= 5230
(iii) R.E.
8300-500
7800
C.E.
8330-490
7840
(iv)
RE
489400-48400
441000
CE
489350-48370
440980
5 .
(i) 5300+18000
= 23300
(ii) 5700-400
= 5300
(iii) 13800 +2900
= 16700
(iv) 48500-23600
= 24900
6.
(i) 1000×390
= 390000
(ii) 4300+10
= 4310
(iii) 860×490
= 421400
(iv) 1300+10
= 1310
Step-by-step explanation:
Hope it really Helped ..... Thank you
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