Khan Academy
Khan Academy: Addition and Subtraction Within 10
Sal solves addition and subtraction equations with number 10 or less. Includes a video, transcript, and question and answer section.
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.
Math Mammoth
Math Mammoth: Review: Adding and Subtracting Whole Tens
This video goes over how to add and subtract multiples of ten to or from a 2-digit number. [8:14]
Math Mammoth
Math Mammoth: Subtraction and Addition in the Same Picture
This video demonstrates how addition and subtraction are related when looking at the same set of objects and models how to solve several problems. [8:13]
Khan Academy
Khan Academy: Subtracting 1s Using Place Value
Demonstrates how to subtract 4 from 46 using drawings of base ten cubes to represent 1s and 10s. [2:45]
Khan Academy
Khan Academy: Addition and Subtraction Within 10
The video describes how to solve basic addition and subtraction problems within 10 where students have to fill in the blank to complete the math sentence.
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.
Math Mammoth
Math Mammoth: Add and Subtract Whole Tens
Teaches how to add and subtract multiples of ten. [5:07]