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PRE-ALGEBRA & MathLine

Pre-Algebra. PRE-ALGEBRA & MathLine. Pre-Algebra. Pre-algebra is difficult because of the confusing language. Equality Principle Balancing an Equation Definition of a Variable, etc. Pre-Algebra. MathLine makes Algebraic concepts EASY TO UNDERSTAND!. Pre-Algebra.

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PRE-ALGEBRA & MathLine

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  1. Pre-Algebra PRE-ALGEBRA & MathLine

  2. Pre-Algebra • Pre-algebra is difficult because of the confusing language. • Equality Principle • Balancing an Equation • Definition of a Variable, etc.

  3. Pre-Algebra MathLine makes Algebraic concepts EASY TO UNDERSTAND!

  4. Pre-Algebra MathLine makes Algebraic concepts EASY TO UNDERSTAND! By introducing abstract ideas with simple language

  5. Pre-Algebra Let’s solve 2x + 5 = 17

  6. Pre-Algebra So ask the student, what do we know in this sentence: 2x + 5 = ? 17 So put 17 on MathLine We know our sum is17

  7. Pre-Algebra With 2x + 5 = 17 We know we added 5 to 2x to get 17

  8. Pre-Algebra So ask, “If we added 5 to get 17, can we subtract 5 from 17?”

  9. Pre-Algebra If we added 5 to get 17 Can we subtract 5?

  10. Pre-Algebra So subtract 5 from 17… 5 4 3 2 1

  11. Pre-Algebra So subtract 5 from 17…

  12. Pre-Algebra 2x = 12 So ask, “What number times 2 equals 12?”

  13. Pre-Algebra There are two ways of finding X for 2x = 12

  14. Pre-Algebra Divide by 12 by two’s..

  15. Pre-Algebra Divide by 12 by two’s..

  16. Pre-Algebra Divide by 12 by two’s..

  17. Pre-Algebra Divide by 12 by two’s..

  18. Pre-Algebra Divide by 12 by two’s..

  19. Pre-Algebra Divide by 12 by two’s..

  20. Pre-Algebra Divide 12 by two’s.. 1 2 3 4 5 6

  21. Pre-Algebra Or divide 12 into two GROUPS… 6 6

  22. Pre-Algebra Either way x = 6 6 6

  23. Pre-Algebra On paper the Algebra looks like this…

  24. Pre-Algebra To get x by itself subtract 5 from both sides of the equation. 2x + 5 = 17 – 5 –5 This is the Equality Principle

  25. Pre-Algebra What is done to one side of the equation… must be done to the other side to keep it equal.

  26. Pre-Algebra 5’s cancel out 2x + 5 = 17 – 5 –5

  27. Pre-Algebra and 17 – 5 equals 12 2x = 17 - 5

  28. Pre-Algebra and 17 – 5 equals 12 2x = 12

  29. Pre-Algebra 2x = 12 So divide by 2 on each side 2 x12 2 2 = Or 2 x ÷ 2 = 12÷ 2

  30. Pre-Algebra So, x = 12÷ 2 Or x = 6

  31. Pre-Algebra Using MathLine to introduce Pre-Algebra is effective and simple.

  32. Pre-Algebra MathLine makes Pre-Algebra Easy to visualize And keeps the confusing language simple.

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