We begin with a set of videos where models are used to understand and explain how to add, subtract, multiply and divide with integers. In these videos, there are no fractions or decimals involved--only positive and negative whole numbers such as -3, -2, -1, 0, 1, 2, 3, etc. Below these three basic videos with integers are videos containing negative numbers that may be fractions or decimals. These are for students who already learned how to compute with fractions and decimals.
Adding Integers Shows how to add postive and negative numbers; uses counters. http://www.youtube.com/watch?v=AIWPLvTNhXs Subtracting Integers Shows how to subtract with positive and negative numbers; uses counters. Explains adding the opposite and the two stroke method. http://www.youtube.com/watch?v=0sMIJkFV1uw Multiplying & Dividing Positive & Negative Numbers Shows the rules for multiplying and dividing with negative and positive numbers. Shows why negative times negative produces a negative number using counters. http://www.youtube.com/watch?v=489iteE0EB4 See Exponents Basics, Exponents 1, and Exponents 3 for videos where the exponents are positive, but where the base might be negative, or negative signs may be in front of the base.
Videos with both Fractions that may also be Negative (These videos are for students who have already learned about fractions.) Videos with both Decimals that may also be Negative (These videos are for students who have already learned about decimals.) Decimals 7 (Add/Subtract positive and negative decimals Part 1): http://youtu.be/7QEmT3iJBtU Decimals 8 (Add/Subtract positive and negative decimals Part 2): http://youtu.be/qJzYcLE7_Mg Decimals 10 (Multiply Positive and Negative Decimals): http://youtu.be/oUzgwvBRSDE Decimals 12 (Simplifying Decimals using order of Operations Part 2--Addition, Subtraction, Multiplication with negative numbers): http://youtu.be/cHu4H-tld68 (dec220.mp4) Decimals 19 (Simplifying Decimals using order of Operations Part 4--Addition, Subtraction, Multiplication, Division--negative numbers): http://youtu.be/xsp4GGn6ZtA (dec277.mp4) Decimals 22 (Simplifying expressions containing Fractions, Decimals--Part 2--with negative numbers): http://youtu.be/fhHkl2sc4dE (dec300.mp4) To understand negative exponents, see Exponents 6, 7 & 8. |