It is 530 because 2 is less than 5
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To round 532 to the nearest 10, you look at the digit in the tens place, which is 3. Since 3 is less than 5, you keep the tens digit the same and change all digits to the right to zero. Therefore, rounding 532 to the nearest 10 gives you 530.
530
500
Round 42,199,279 to the nearest 10 million.
To round 12 to the nearest 10, you look at the digit in the tens place, which is 1. Since 1 is less than 5, you round down. Therefore, rounding 12 to the nearest 10 gives you 10.
It would stay the same