Answer :

Remember, you will round up if the number you are looking at is 5-9 and you will round down if it is 0-4. 758 will be rounded up since we look at the tens place to round to the nearest hundred and it is 5. So, the answer is 800.
voytek
If a number has three digits (like 758, 999 or 125) you take a look at the second last digits. If they are higher than 50 you round the first digit up. Otherwise you round it down. Finally you add two zeros.

In case of 758, the last two digits are 58. It is more than 50 so you round 758 to 800.

Hope it helps!

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