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Mastering Variables in Math: A Beginner's Guide

Learn the definition of variables with symbols in number sentences. Practice problems included to enhance understanding.

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Mastering Variables in Math: A Beginner's Guide

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  1. Bell Work - Addition 1) 9,486 2) 1,506 + 1,589+ 841

  2. VARIABLES Definition – symbols that represent unknown numbers

  3. VARIABLES What do the symbols look like? The symbols are letters of the alphabet. (Like x, y, z, a, b, c, n, u, and v.)

  4. VARIABLES A number sentence with variable might look like this: b + 4 = 10 OR w – 6 = 1 OR a ÷ 2 = 5 REMEMBER: A variable stands for a number. Sometimes it’s easy to tell what it stands for.

  5. VARIABLES Sometimes we are shown what the variable stands for. Like this: If z = 10, what is the value of z + 7?

  6. SAMPLE PROBLEMS If y = 4, find the value of each. • y + 8 3) y x5 • y – 3 4) y ÷ 2

  7. SAMPLE PROBLEMS If y = 4, find the value of each. • y + 8 3) y x5 4 + 8 = 12 4 x 5 = 20 2) y – 3 4) y ÷ 2 4 – 3 = 1 4÷ 2 = 2

  8. PRACTICE If h = 9, find the value of each. • h + 13 4) h – 4 • h – 7 5) h x 9 • h + 30 6) h ÷ 3

  9. HOMEWORK If g = 10, find the value of each. • g + 11 4) g – 10 • g – 3 5) g x 7 • g + 50 6) g ÷ 2 7) Draw a common symbol. Try these? 8) g2 9) 4g – 12 10) 3(g – 2)

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