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Formulating expressions, equations, & Inequalities. Pre-Algebra Mrs. Yow. DCMS stands for??. DeSoto Central Middle School !!!!. BFF stands for???. What about?. LOL???. GTG?. TTYL??. What about??. What is a VARIABLE???. A letter that stands for….. A NUMBER !.
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Formulating expressions, equations, & Inequalities Pre-Algebra Mrs. Yow
DCMS stands for?? DeSoto Central Middle School!!!!
What is a VARIABLE??? A letter that stands for….. A NUMBER!
NEW VOCABULARY! • VARIABLE – a letter that stands for a number • ALGEBRAIC EXPRESSION – a mathematical expression that contains one or more variables • EX: x+5 • NUMERICAL EXPRESSION – a mathematical expression that contains ONLY numbers • EX: 3+5
ADDING WORDS (+) PLUS SUM MORE THAN INCREASED BY TOTAL IN ALL
SUBTRACTING WORDS (-) MINUS DIFFERENCE LESS THAN SUBTRACT DECREASED BY FEWER THAN
MULTIPLICATION WORDS (x) TIMES PRODUCT MULTIPLIED
DIVIDING WORDS DIVIDED QUOTIENT SEPARATED
Translate into algebraic expressions….. Verbal Expressions Algebraic Expressions The sum of a number, x, and 10 The difference of 6 and 6 3 times d The quotient of 3 & y x+10 6-r 3d 3 y or
MORE THAN FEWER THAN LESS THAN 5 more than x x+5 7 less than d d-7 500 fewer than y y-500 FLIP THE PROBLEM!!!
Write an algebraic EQUATION (=) • You buy 6 bottles of sports drink. You also buy a box of snacks that costs $4.59. The bill is $13.53. Which equation would determine how much each bottle of sports drink costs? 6d=4.59+13.53 6d=4.59 6d+4.59=13.53 6d=13.53
Write an algebraic EQUATION (=) Which equation represents the following situation? Sam has 20 DVDs in his collection, which is 5 times as many DVDs as Richard has. How many DVDs, “d”, does Richard have? 5d=20 20-d=5 d/5=20 5+d=20
Write an algebraic EQUATION (=) Which equation represents the following problem? Dean ate 11 cookies after dinner, which was 3 more than twice as many cookies as Sara ate. How many cookies, c, did Sara eat? 2c+11=3 2c-3=11 2c-11=3 2c+3=11