# Arithmetic

#### Arithmetic is the most basic form of Mathematics, it is essential to all branches of Mathematics and many branches of Science. Created by Khan Academy.

###### Average Course Length

8 hours

###### Skill Level

Beginner

##### Pick a lesson

1: Basic Addition

2: Addition 2

3: Level 2 Addition

4: Addition 3

5: Addition 4

6: Basic Subtraction

7: Subtraction 2

8: Subtraction 3: Introduction to Borrowing or Regrouping

9: Alternate mental subtraction method

10: Why borrowing works

11: Level 4 Subtraction

12: Why borrowing works

13: Adding Decimals

14: Subtracting decimals

15: Basic Multiplication

16: Multiplication : The Multiplication Tables

17: Multiplication : 10,11,12 times tables

18: Multiplication : 2-digit times a 2-digit number

19: Multiplication : Multiple Digit Numbers

20: Multiplication : Old video giving more examples

21: Mulitplication : Multiplying decimals

22: Lattice Multiplication

23: Why Lattice Multiplication Works

24: Division 1

25: Division 2

26: Division 3: More long division and remainder examples

27: Level 4 division

28: Converting fractions to decimals

29: Percent and decimals

30: Dividing decimal

31: Ordering Numeric Expressions

32: Greatest Common Divisor

33: Equivalent fractions

34: Mixed numbers and improper fractions

35: Time Differences 1

36: Time Differences in Different Time Zones

37: Prime Numbers

38: Partial Quotient Division

39: Partial Quotient Method of Division 2