Addition and subtraction
First, we will learn how addition and subtraction relate. Next, we will add and subtract numbers less than or equal to 20 and solve addition and subtraction word problems. Finally, we will begin adding 2-digit numbers.
This course contains 9 segments:
Relate addition and subtraction
Learn how to addition and subtraction are related. Numbers used are 10 or less.
Addition within 20
Learn to add. Numbers used are 20 or less.
Subtraction within 20
Learn to subtract. Numbers used are 20 or less.
Equal sign
Learn the meaning of '=', the equal sign.
Missing number within 20
Learn how to solve problems like "___ + 7 = 18" where you don't know one of the values in an addition or subtraction equation.
Word problems within 20
Learn how to solve addition and subtraction word problems. Numbers used are 20 or less.
Word problems with "more" and "fewer"
Learn how to solve word problems that use the words "more" and "fewer". Numbers used are 20 or less.
Adding 1s and 10s
Learn how to solve addition problems like 23+4 and 23+40.
Intro to addition with 2-digit numbers
Learn how to add two-digit numbers. By the end of this tutorial, you'll be able to solve problems like 48+6 and 48+21. More advanced problems like 48+28 will be covered in a future tutorial.
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Rating | Not enough ratings |
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Length | 9 segments |
Starts | On Demand (Start anytime) |
Cost | Free |
From | Khan Academy |
Download Videos | On all desktop and mobile devices |
Language | English |
Subjects | Mathematics |
Tags | Math |
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Rating | Not enough ratings |
---|---|
Length | 9 segments |
Starts | On Demand (Start anytime) |
Cost | Free |
From | Khan Academy |
Download Videos | On all desktop and mobile devices |
Language | English |
Subjects | Mathematics |
Tags | Math |
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