1. http://www.mathslideshows.com Equations

2. http://www.mathslideshows.com An equation is a mathematical statement that shows 2 quantities are equal. An equation contains an equal sign. 12 – 3 = 9 Numerical 3a = 30 Algebraic Equations

3. http://www.mathslideshows.com Equations Equals Sign (=) Means that the amount is the same on both sides. 4 + 2 = 6 5 – 2 = 3

4. http://www.mathslideshows.com An Equation is like a balance scale. Everything must be equal on both sides. 10 5 + 5 = Equations

5. http://www.mathslideshows.com When the amounts are equal on both sides it is a true equation. 12 6 + 6 = Equations

6. http://www.mathslideshows.com When the amounts are unequal on both sides it is a false equation. 8 2 + 2 = Equations

7. http://www.mathslideshows.com When an amount is unknown on one side of the equation it is an open equation. 7 n + 2 = Equations

8. http://www.mathslideshows.com When you find a number for n you change the open equation to a true equation. You solve the equation. 7 n + 2 = 5 Equations

9. http://www.mathslideshows.com Are these equations true, false or open? 11 - 3 = 5 13 + 4 = 17 N + 4 = 7 12 – 3 = 8 3 + v = 13 15 – 6 = 9 false true open false open true Equations

10. http://www.mathslideshows.com An equation i s a statement of equality between two quantities. x + 2 = 5 “ is the same as ” =x + 25 fulcrum Equations

11. http://www.mathslideshows.com =x + 25 Could x equal 6? Equations

12. http://www.mathslideshows.com =6 + 25 Could x equal 6? Equations

13. http://www.mathslideshows.com = 6 + 25 Could x equal 6? Equations

14. http://www.mathslideshows.com = 6 + 25 Could x equal 6? Equations

15. http://www.mathslideshows.com = 6 + 25 Could x equal 6? Equations

16. http://www.mathslideshows.com =x + 25 What does x equal? Equations Solution : x = 3

17. http://www.mathslideshows.com = + 25 What does x equal? Equations Solution : x = 3 3

18. http://www.mathslideshows.com Equations A solution is the final answer to an equation, or the value of the variable. Example: 3a = 30 a = 10 is the solution

19. http://www.mathslideshows.com Equations Is x = 5 a solution? ? ?

20. http://www.mathslideshows.com Equations Is x = 6 a solution? ? ?

21. http://www.mathslideshows.com Equations Inverse operation – the opposite operation used to undo the first. 4 + 3 = 7 7 – 4 = 3 6 x 6 = 36 / 6 = 6

22. http://www.mathslideshows.com Equations How to solve an addition equation Use the inverse operation for addition which is subtraction m + 8 = 12 - 8 = 4 m = 4 4 + 8 =

23. http://www.mathslideshows.com Equations How to solve an subtraction equation Use the inverse operation for subtraction which is addition m - 3 = 5 5 + 3 = 8 m = 8 8 - 3 = 5

24. http://www.mathslideshows.com Equations Solve these equations using the inverse operations n + 4 = 7 n – 5 = 4 n + 4 = 17 n – 6 = 13 n + 7 = 15 n – 8 = 17 3 9 13 19 8 25

25. http://www.mathslideshows.com Equations Solve these equations using the inverse operations 1) 2)

26. http://www.mathslideshows.com Equations Solve these equations using the inverse operations 3) 4)

27. http://www.mathslideshows.com Equations Solve these equations using the inverse operations 5) 6)

28. http://www.mathslideshows.com Equations Take Out Your Study Guide!!!

29. http://www.mathslideshows.com Equations An equation is a mathematical statement that shows 2 quantities are equal. An equation contains an equal sign. #1 12 – 3 = 9 Numerical 3a = 30 Algebraic To solve any equation use inverse operations. Your goal is to get the variable all by itself.

30. http://www.mathslideshows.com SOLUTION A solution is the final answer to an equation, or the value of the variable. #2 Example: 3a = 30 a = 10 is the solution

31. http://www.mathslideshows.com Extra

32. http://www.mathslideshows.com Equations An equation is a mathematical statement that shows 2 quantities are equal. An equation contains an equal sign. #1 12 – 3 = 9 Numerical 3a = 30 Algebraic

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