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075 Operations Q&A

Arithmetic and Algebra

What is the difference between an expression and an equation? An equation involves an equal sign, an expression does not
What does order of operations mean? It tells us which operation must be done first
What is the order of operations? Division -> multiplication -> subtraction -> addition
Evaluate the expression (20 - 13) x 5 7 x 5 = 35; Answer = 35
Evaluate the expression n ÷ 2 - 3, when n = 6 (6 ÷ 2) - 3 = (3) - 3 = 0; Answer = 0
Which is an example of an equation: 10 + x or 12 - 3 = x? 12 - 3 = x. (This is can be read as "The difference between 12 and 3 is x")
"... more than ..." or "... greater than..." means: It means to add to a given number, value, symbol or term
"... less than ..." or "... smaller than..." or "... fewer than ..." means: It means to subtract from a given number, value, symbol or term
"... twice as many ..." or "... double..." or "... two times the number of..." means: It means double or two times the amount
"... half of ..." or "... half as many as..." means: It means to divide a value, number, symbol or term by 2
"... half of n" or "... half as many as n" means: It means to divide n by 2
Created by: Mindful_Pumpkin