Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Level 2 Addition
A video explaining addition of a two-digit number and a one-digit number using the addition algorithm, objects and number lines. Practice problems are available. [9:47]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Basic Subtraction
This video covers a short review of addition, followed by basic subtraction concepts. Practice problems are available. [8:32]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Subtraction 2
This video provides an overview of subtraction. Practice problems are available. [12:32]
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.
Khan Academy
Khan Academy: Addition Word Problems Within 10
Sal solves word problems by adding small numbers of objects (numbers 10 or less). Includes a video, transcript, and question and answer section. [1:41]
Khan Academy
Khan Academy: Subtraction Word Problems Within 10
Sal solves a word problem about sharks by subtracting numbers less than 10. Includes a video, transcript, and question and answer section. [1:02]
Khan Academy
Khan Academy: Relating Addition and Subtraction
Sal demonstrates the relationship between addition and subtraction using objects. Includes a video, transcript, and question and answer section. [2:05]
Khan Academy
Khan Academy: Addition Word Problems Within 10
The video discusses examples of addition word problems that add small numbers (numbers 10 or less).
Khan Academy
Khan Academy: Subtraction Word Problems Within 10
The video describes how to solve word problems by subtracting small numbers (numbers 10 or less).
PBS
Pbs: Odd Squad: To Catch a Double
Learn about doubling numbers with the Odd Squad. While babysitting the doubled Debbies, Otto discovers something that might help Olive crack the case and find the missing double.
PBS
Pbs: Odd Squad: Game Time!
Olive and Otto need to add multiple small numbers together in series. There's only one thing to do: go to the Mathroom.
PBS
Pbs: Odd Squad: Mathroom Reunion
Learn about addition, subtraction, and making amounts equal with the Odd Squad. When Ms. O and O'Donahue visit the Mathroom, she is excited to see her old friend and help with the case.
PBS
Pbs: Odd Squad: Why Are Shapes Disappearing?
Olive and Otto use counters to figure out how many objects are being taken away in a visit to the Mathroom.
PBS
Pbs: Odd Squad: Double Debbies
Learn about doubling numbers with the Odd Squad. Debbie, from Delivery Debbie's pizza place, is so busy that she doubled herself!