The smallest number that would round up to the nearest 100 to make 800 is 750.
Well, let's take a moment to appreciate the number 747. Now, when we round it to the nearest tens place, we look at the digit in the ones place. Since 7 is greater than or equal to 5, we round up. So, 747 rounded to the nearest tens is 750. Just a happy little rounding adjustment!
800
800
No its not
800
Ah, let's take a moment to appreciate the number 750. When we round it to the nearest ten, it becomes 750. The zero at the end remains the same, like a happy little tree standing tall in our mathematical landscape.
round 90 to the nearest ten
200
750
750
750