Rounding Study Guide
Place Values:
Thousands, hundreds, tens, ones (whole number) . tenths, hundredths, thousandths, ten-thousandths
Example 1:
Round 0.468 to the nearest tenth.
4 is in the tenth place. → 0.468
Everything to the LEFT STAYS. → 0.
Look to the right of the number. A 5 or above, the number will become one higher. A 4 or below, the number will stay the same. → 0.468 to the right of the 4 is a 6, so the 4 will become a 5.
Everything to the right of the number becomes a zero. → 0.500 we do not need the zeros after the decimal because it does not change the value of the number.
The answer is 0.5.
Example 2:
Round 4,204.21 to the nearest hundred.
2 is in the hundreds place. → 4,204.21
Everything to the LEFT STAYS → 4,
Look to the right of the number. A 5 or above, the number will become one higher. A 4 or below, the number will stay the same. → 4,204.21 to the right of the 2 is a 0, so the 2 will stay a 2.
Everything to the right of the number becomes a zero. → 4,200.00 we so not need the zeros after the decimal because it does not change the value of the number.
The answer is 4,200.