Round decimals

Learning Objectives Identify the digit in the tenths and hundredths place. Explain the role of the 'neighbor digit' in rounding. State the rule for rounding up (5 or more). State the rule for keeping the digit the same (4 or less). Round a decimal with tenths and hundredths to the nearest whole number. Round a decimal with hundredths to the nearest tenth. Have you ever seen a price like $9.95 at a store? Why do you think they do that instead of just saying $10? 🤔 Let's find out! Today, we will learn how to round decimals. Rounding helps us make numbers simpler and easier to work with, which is super useful for estimating costs or measurements quickly. It's like finding the 'closest' simple number. Real-World Applications Estimating the tot...

TermDefinitionExample DecimalA number that has a whole number part and a fractional part, separated by a decimal point.In the number 12.75, '12' is the whole number part and '.75' is the fractional part. Decimal PointThe dot in a decimal number that separates the ones place from the tenths place.The dot in 3.4 is the decimal point. Tenths PlaceThe first place value to the right of the decimal point.In 5.82, the digit '8' is in the tenths place. Hundredths PlaceThe second place value to the right of the decimal point.In 5.82, the digit '2' is in the hundredths place. RoundingChanging a number to a simpler, 'neater' number that is close to the original value.Rounding $1.99 to the nearest dollar gives you $2.00. Rounding DigitThe digit in the...

The '5 or More' Rule If the neighbor digit is \( \ge 5 \) (5, 6, 7, 8, or 9), you round up. Look at the digit to the right of your rounding place. If it's 5 or more, you add one to your rounding digit. A fun rhyme is: '5 or more, raise the score!' The '4 or Less' Rule If the neighbor digit is \( \le 4 \) (4, 3, 2, 1, or 0), you keep the rounding digit the same. Look at the digit to the right of your rounding place. If it's 4 or less, your rounding digit stays the same. A fun rhyme is: '4 or less, let it rest!' The 'Clean Up' Rule After rounding, all digits to the right of the rounding digit are dropped. Once you have decided whether to round up or keep the digit the same, you remove all the digits that came...