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Closes this module. Mysterious negative numbers! What ARE they? They are numbers less than zero. If you understand the nature of below zero temperatures, you can understand negative numbers. We'll help. Created by Sal Khan.How many questions do you need to level up negative numbers?
Adding negative numbers on the number line Get 5 of 7 questions to level up! Adding negative numbers Get 5 of 7 questions to level up! Understand subtraction as adding the opposite Get 3 of 4 questions to level up! Interpret negative number addition and subtraction expressions Get 3 of 4 questions to level up!What does the negative sign mean on an exponent?
The negative sign on an exponent means the reciprocal. Think of it this way: just as a positive exponent means repeated multiplication by the base, a negative exponent means repeated division by the base. So 2^ (-4) = 1/ (2^4) = 1/ (2*2*2*2) = 1/16.What is 2 to the negative 4?
So 2 to the negative 4 is the same thing, based on the way we've defined it just up right here, as reciprocal of 2 to the fourth, or 1 over 2 to the fourth. And so you could view this as being 1/2 times 2 times 2 times 2, if you just view 2 to the fourth as taking four 2's and multiplying them.