Curated OER
How Do You Round Numbers?
Review the concept of rounding numbers in the millions. Using the example 2,561,190, the narrator rounds numbers to the nearest million, hundred thousand, ten thousand, thousand, hundred and ten. This is a terrific way to reinforce...
Curated OER
What is Place Value for Whole Numbers?
Whole numbers are the natural numbers including zero. The instructor illustrates and explains place value. She draws a place value chart and then defines each term and what the numbers mean. She writes a number in standard form and then...
Curated OER
How Do You Find the Value of a Digit in a Whole Number?
The instructor illustrates place value by first drawing a place value chart. Then she inserts the numbers in question so she can find the value of certain digits. I think her chart really helps visually.
Khan Academy
Singapore Math: Grade 3a, Unit 1 (Part 2)
As part of a series on numbers less than 10,000, a thorough presentation demonstrates how to visualize numbers in groups of a thousand. The instructor then describes how to read and write numbers less than 10,000.
Khan Academy
Singapore Math: Grade 3a, Unit 1 (Part 1)
Using a step-by-step approach, Sal from Kahn Academy visually describes what a group of 10, 100, and 1,000 means. It explores the value of numbers less than 10,000. The example is easy to understand. He puts marbles in a can, and the...
Khan Academy
Singapore Math: Grade 3a, Unit 2 (Part 4)
Use the Singapore math methods to work through simple problems. Visual representations of word problems allow viewers to start making predictions and estimating the answers. This is a good way for class members to use various methods to...
Khan Academy
Khan Academy: Adding 8 + 7
Sal adds 8 + 7 by making a group of ten. Includes a video, transcript, and question and answer section. [3:18]
Khan Academy
Khan Academy: Number Grid
Sal goes through all the numbers from 0 to 100 and shows some interesting patterns. Includes a video, transcript, and question and answer section. [4:58]
Khan Academy
Khan Academy: Counting by Tens
This video demonstrates how to count by tens using numbers and ten frames. Includes a transcript, and question and answer section. [1:34]
CK-12 Foundation
Ck 12: Elem Math: Overview of Addition
[Free Registration/Login may be required to access all resource tools.] The video describes the two basic methods of adding numbers up to twenty. The methods shown are counting on and using tens and ones.
Khan Academy
Khan Academy: Teens as Sums With 10
The video looks at the 1 in each teen number and thinks about what it really means as representing 10, and the pattern of the teen numbers as ten plus some other number.
CK-12 Foundation
Ck 12: Elem Math: One Step Conversions Between Hundreds Tens and Ones
[Free Registration/Login may be required to access all resource tools.] The video uses place value to determine the number of hundreds given a specific number of ones. The video is followed by a series of practice questions to assess...
PBS
Pbs: Odd Squad: Tracking the Number Hog
Olive and Otto learn about using zero in the ones and tens place of numbers to make numbers bigger. Will this help them track down the Number Hog?
Khan Academy
Khan Academy: Multiplying by Tens Word Problem
Lindsay from Khan Academy multiplies 90 times 5 to solve a word problem. [2:29]
Khan Academy
Khan Academy: Place Value Example: 25
This place value video lesson illustrates the number 25 as two tens and five ones. [2:55]