Khan Academy
Khan Academy: Estimating Decimal Addition
Estimate to find reasonable solutions to addition division problems.
Khan Academy
Khan Academy: Adding Decimals With Ones and Tenths Parts
Sal uses an understanding of place value to add decimals, such as 4+5.7.
Khan Academy
Khan Academy: Adding Decimals With Hundredths
Sal uses an understanding of place value to add decimals, such as 0.68+0.33.
Khan Academy
Khan Academy: Adding Decimals With Ones, Tenths and Hundredths
Sal adds numbers, such as 3.53+4.72, by breaking them down into place values.
Khan Academy
Khan Academy: Dividing a Decimal by a Whole Number With Fraction Models
Sal divides a decimal by a whole number with fraction models.
Khan Academy
Khan Academy: Dividing a Decimal by a Whole Number on the Number Line
Dividing a decimal by a whole number on a number line.
Khan Academy
Khan Academy: Naming and Ordering Numbers Worked Example
Sal Khan works through a question on ordering numbers from the Praxis Core Math test. [3:00]
PBS
Pbs: Building Deeper Understanding of Decimal Numbers
Steve Hinds demonstrates how a brief discussion of money and decimals can help students to shed common misconceptions about decimal place value.
Homeschool Math
Homeschool Math: How to Calculate a Percentage of a Number
Learn the basics of how to calculate percentages of quantities in this easy lesson. [5:22]
Khan Academy
Khan Academy: Division Strategies for Decimal Quotients
Sal uses an understanding of place value and fractions to introduce dividing with decimals.
Khan Academy
Khan Academy: Pattern When Dividing by Tenths and Hundredths
Sal illustrates patterns by dividing decimals by the tenth and hundredths.
Khan Academy
Khan Academy: Developing Strategies for Multiplying Decimals
Sal uses place value and equivalent fractions to multiply decimals.
Khan Academy
Khan Academy: Regrouping With Decimals
Sal regroups decimal numbers using tables and place value charts.
Khan Academy
Khan Academy: Visual Understanding of Regrouping Decimals
Sal uses place value grids to regroup decimal numbers.
Khan Academy
Khan Academy: Thousandths on the Number Line
Sal identifies decimals through the thousandths on a number line.
Khan Academy
Khan Academy: Comparing Decimals: 9.97 and 9.798
Sal compares 9.97 and 9.798 using place value.
Khan Academy
Khan Academy: Comparing Decimals: 156.378 and 156.348
Sal compares 2 decimals using place value.
Khan Academy
Khan Academy: Comparing Decimals in Different Representations
Sal compares decimals numbers in standard, written, and expanded form.
Sophia Learning
Sophia: Dividing Two Digit Numbers by Two or Three Digit Numbers: Lesson 4
This video demonstrates division of two-digit numbers by two- or three- digit numbers. This lesson is 4 of 19 in the series titled "Dividing Two Digit Numbers by Two or Three Digit Numbers." Includes short multiple-choice quiz. [2:07]
Sophia Learning
Sophia: Dividing 2 Digit Numbers by 2 or 3 Digit Numbers Repeating: Lesson 13
This lesson demonstrates division of two digit numbers by either two or three digit numbers, where the answer will contain a repeating decimal. It is 13 of 18 in the series titled "Dividing Two Digit Numbers by Two or Three Digit Numbers...
Sophia Learning
Sophia: Dividing 2 Digit Numbers by 2 or 3 Digit Numbers Repeating: Lesson 5
This lesson demonstrates division of two digit numbers by either two or three digit numbers, where the answer will contain a repeating decimal. It is 5 of 18 in the series titled "Dividing Two Digit Numbers by Two or Three Digit Numbers...
Sophia Learning
Sophia: Estimating a Percentage: Lesson 2
This lesson covers how to use estimation when working with percentages. It is 2 of 8 in the series titled "Estimating a Percentage."
Sophia Learning
Sophia: Estimating a Percentage: Lesson 3
This lesson covers how to use estimation when working with percentages. It is 3 of 8 in the series titled "Estimating a Percentage."
Sophia Learning
Sophia: Estimating a Percentage: Lesson 5
This lesson covers how to use estimation when working with percentages. It is 5 of 8 in the series titled "Estimating a Percentage."