In this Grade 6 Saxon Math Course 1 lesson, students learn how to round decimal numbers to the nearest cent, tenth, and whole number using the standard rounding rule of looking at the digit immediately to the right of the target place value. The lesson applies rounding in real-world contexts such as calculating sales tax and estimating products of decimals. Practice problems reinforce rounding skills alongside estimation strategies and multi-step money calculations.
Section 1
📘 Rounding Decimal Numbers
To round a decimal, look at the digit to the right of the target place. If this digit is 5 or greater, round up; otherwise, round down.
Now, you'll apply this rule in worked examples for rounding to different place values, including money, and see how it's used for estimation.
Section 2
Rounding to the Nearest Cent
Money amounts are usually rounded to two places after the decimal point.
To round to the nearest cent, we look at the third decimal place:
Think of it this way: you only have pennies, so any smaller fraction has to go! Just peek at the third decimal digit. If that digit is 5 or more, your cents round up to the next penny. If it's 4 or less, that tiny fraction of a cent just vanishes.
Section 3
Rounding to the Nearest Tenth
To round a decimal to the nearest tenth, you must look at the digit in the hundredths place.
To round to the nearest tenth, we look at the hundredths digit:
Let the hundredths digit be your guide! If this 'boss' digit is a 5 or anything bigger, it tells the tenths digit to 'level up' by one. If the boss is 4 or smaller, it just packs its bags and leaves quietly, letting the tenths digit stay exactly as it was.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter
Expand to review the lesson summary and core properties.
Section 1
📘 Rounding Decimal Numbers
To round a decimal, look at the digit to the right of the target place. If this digit is 5 or greater, round up; otherwise, round down.
Now, you'll apply this rule in worked examples for rounding to different place values, including money, and see how it's used for estimation.
Section 2
Rounding to the Nearest Cent
Money amounts are usually rounded to two places after the decimal point.
To round to the nearest cent, we look at the third decimal place:
Think of it this way: you only have pennies, so any smaller fraction has to go! Just peek at the third decimal digit. If that digit is 5 or more, your cents round up to the next penny. If it's 4 or less, that tiny fraction of a cent just vanishes.
Section 3
Rounding to the Nearest Tenth
To round a decimal to the nearest tenth, you must look at the digit in the hundredths place.
To round to the nearest tenth, we look at the hundredths digit:
Let the hundredths digit be your guide! If this 'boss' digit is a 5 or anything bigger, it tells the tenths digit to 'level up' by one. If the boss is 4 or smaller, it just packs its bags and leaves quietly, letting the tenths digit stay exactly as it was.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter