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Solving Equations

Solving Equations. Grade 5 Math. Definitions. Equation A mathematical sentence stating that 2 expressions are equal. 12 – 3 = 9 8 + 4 = 12. Definitions. Equals Sign (=) Means that the amount is the same on both sides. 4 + 2 = 6 5 – 2 = 3.

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Solving Equations

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  1. Solving Equations Grade 5 Math

  2. Definitions • Equation A mathematical sentence stating that 2 expressions are equal. • 12 – 3 = 9 • 8 + 4 = 12

  3. Definitions • Equals Sign (=) Means that the amount is the same on both sides. • 4 + 2 = 6 • 5 – 2 = 3

  4. An equation is like a balance scale. everything must be equal on both sides. = 10 5 + 5

  5. When the amounts are equal on both sides it is an equation. 12 = 6 + 6

  6. When the amounts are unequal on both sides it is an inequality. ≠ 8 2 + 2

  7. Unknowns

  8. Are these expressions or equations? • 11 - n = 5 • m + 4 = 17 • N + 4 • 12 – 3 = p • 3 + v = 13 • y – 6 equation equation expression equation equation expression

  9. How to Solve Equations • Inverse operation ~ the opposite operation used to undo the first. • 4 + 3 = 7 7 – 3 = 4 • 6 x 6 = 36 36 / 6 = 6

  10. How to solve an addition equation • Use the inverse operation for addition which is subtraction • m+ 8 = 12 - 8 = -8 m = 4

  11. How to solve a subtraction equation • Use the inverse operation for subtraction which is addition • m- 3 = 5 +3 =+3 m = 8

  12. 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

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