2 Answers

That means to round the number 186 to the nearest ones, tens, or hundreds. In other words, the place value each digit holds.

186 > the 1 value place is hundreds

           the 8 value place is tens

           the 6 value place is ones 

Remember: Round up if the digit to the right of the place value you are rounding is greater than or equal to 5.  Round down (digit stay the same) if digit to the right is less than or equal to 4.

The numbers to the right will become zeros after rounding a place value.

Round 186 to nearest tens  >  the number 6 is greater than 5, so round up.

     190

Round 186 to nearest hundreds  >  the number 8 is greater than 5, so round up.

     200

Rounding to the nearest ones, is rounding to the nearest whole unit or number.

Ex.

Round 186.3765 to the nearest whole number. The numbers after decimal point is............

      3 is tenths

      7 is hundredths

      6 is thousandths

      5 is ten thousandths

Look at the 3, it is less than 5, so the nearest whole number is.........

      186

Round 186.54 to the nearest whole number.  Look at the 5, round up.

       187

186   when you round, you generally round to the nearest 10 or 100. In your example, the 1 represents 1 hundred 100. The 8 represents 8 tens, eighty, 80. There are 6 in the ones place.

Rounding to the nearest 10 requires looking at the amount in the place value to the right, the ones. If the value of the ones is 0, 1, 2, 3, or 4, you do not increase the tens as you change the ones to 0.  184 would round to 180.

If the ones is 5, 6, 7, 8, or 9, increase the tens by one and 0 the ones. 186 becomes 190.