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VARIABLES & EXPRESSIONS 1-1 VOCABULARY • Variable – a letter that stands for a number • Variable Expression – mathematical phrase that uses variables, numerals, and operational symbols • Numerical Expression – mathematical phrase that uses numbers and operational symbols only Examples… Identify as a Numerical or Variable Expression 50 – 5 c–5 4t 7x3 8÷x d + 43 – 9 Numerical Variable Variable Numerical Variable Variable Mathematical Operations ADD SUBTRACT MULTIPLY DIVIDE Total Difference Product Quotient More than Fewer than Times Divided by Increased by Less than • , ( ), x ÷, ---, / Decreased by + - Examples Translate from word sentences to number sentences. 1.) m divided by 6 m/6 K–9 2.) 9 less than k Create problems based on what is written. 1.) The value in cents of 5 quarters 5(25) 2.) The number of months in y years Y(12)
