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  1. Basic Addition | Arithmetic (video) | Khan Academy

    Let's learn about basic addition by starting with simple examples and moving on to more difficult problems. Two methods for solving these problems are demonstrated: drawing circles to represent …

  2. Addition and subtraction intro | Early math review | Khan Academy

    Sure, you can count to 10, but did you know you can add and subtract numbers within 10 too? It might sound tricky, but don't worry-- you're going to have a blast learning all the different ways numbers …

  3. Addition and subtraction | 1st grade math | Khan Academy

    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 …

  4. Addition and Subtraction | Arithmetic | Khan Academy

    Unit 2: Addition and subtraction About this unit In this topic, we will add and subtract whole numbers. The topic starts with 1+1=2 and goes through adding and subtracting within 1000. We will cover …

  5. 1st Grade Math | Khan Academy

    Learn first grade math—addition, subtraction, length, graphs, time, and shapes. (aligned with Common Core standards)

  6. Arithmetic - Khan Academy

    This Arithmetic course is a refresher of place value and operations (addition, subtraction, division, multiplication, and exponents) for whole numbers, fractions, decimals, and integers.

  7. Arithmetic (all content) | Khan Academy

    Learn arithmetic—addition & subtraction, multiplication & division, fractions, decimals, and more.

  8. Integers | TG Math Class 7 | Khan Academy

    Practice Negative number addition and subtraction: word problems Get 3 of 4 questions to level up!

  9. Number operations | Khan Academy

    Estimating when adding and subtracting Learn Estimating when adding multi-digit numbers Estimating when subtracting large numbers

  10. Whole numbers and operations | Khan Academy

    Word problem addition and subtraction of whole numbers Learn Addition word problem: horses Three digit addition word problems Subtraction word problem: tennis balls