alanaruth3389
19.03.2021 •
Mathematics
Write 25387 correct to 4 significant figures
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Ответ:
2.539 × 104
3254002.54 × 104
2250002.5 × 104
1300003 × 104
Ответ:
The answer is 600
Step-by-step explanation:
Front end estimation is a method of rounding use to make operations more easily and obtain approximate answers. Is called front end because we take the first digit of the number or the "front digit" and round our number to the nearest value detemined by our front end digit, making zeros the other numbers until the end.
In your case we have:
788.44 - 7 is the front number - in hundreds place - we round to nearest hundred 788.44 and this is 800.
225.6 - 1 is the front number - in hundreds place - we round to nearest hundred 225.6 and this is 200.
We perform the operation and obtain : 800-200 = 600.