Semester Exam 5/6 B

Front

What is rounding in mathematics?

Back

Rounding is the process of adjusting the digits of a number to make it simpler while keeping its value close to what it was. It often involves increasing or decreasing the last digit based on the value of the next digit.

Front

How do you round a number to the nearest tenths?

Back

To round a number to the nearest tenths, look at the digit in the hundredths place. If it is 5 or greater, round up the tenths place by one. If it is less than 5, keep the tenths place the same.

Front

Round 34.17 to the nearest tenths.

Back

34.2

Front

Round 50.05 to the nearest tenths.

Back

50.1

Front

What is the significance of significant figures in measurements?

Back

Significant figures indicate the precision of a measurement. They include all the non-zero digits, any zeros between them, and any trailing zeros in the decimal portion.

Front

How do you determine the number of significant figures in a measurement?

Back

Count all non-zero digits, any zeros between them, and trailing zeros in the decimal portion. Leading zeros are not counted.

Front

Round 36.65 inches to the nearest tenths.

Back

36.7 in

Front

Round 23.56 miles to the nearest tenths.

Back

23.6 miles

Front

What is the formula for converting miles to kilometers?

Back

1 mile = 1.60934 kilometers.

Front

Convert 23.6 miles to kilometers.

Back

23.6 miles = 37.96 kilometers.