Answer
Answer: 42.988
Work Step by Step
Round the decimal to the given place value: 42.9878, nearest thousandth.
Step 1: Locate the digit to the right of the given place value.
Step 2: If this digit is 5 or greater, add 1 to the digit in the given place value and drop all digits to its right.
If this digit is less than 5, drop all digits to the right of the given place.
0.1234: 1 is on the tenths place
2 is one the hundredths place
3 is on the thousandths place
Because 8 is to the right of 7 and greater than 5, 42.9878 is rounded up to 42.988
Answer: 42.988
