1 / 21

Algebra II

Algebra II. By Monica Yuskaitis. Definitions. Equation – A mathematical sentence stating that 2 expressions are equal. 12 – 3 = 9 8 + 4 = 12. Definitions. Equation – A mathematical sentence with an equals sign. 16 – 5 = 11 14 + 3 = 17. Definitions.

zuwena
Télécharger la présentation

Algebra II

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Algebra II By Monica Yuskaitis

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

  3. Definitions • Equation – A mathematical sentence with an equals sign. • 16 – 5 = 11 • 14 + 3 = 17

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

  5. An Equation is like a balance scale. Everything must be equal on both sides. = 10 5 + 5

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

  7. When the amounts are unequal on both sides it is a false equation. = 8 2 + 2

  8. When an amount is unknown on one side of the equation it is an open equation. = 7 n + 2

  9. When you find a number for n you change the open equation to a true equation. You solve the equation. = 7 5 n + 2

  10. Are these equations true, false or open? false • 11 - 3 = 5 • 13 + 4 = 17 • N + 4 = 7 • 12 – 3 = 8 • 3 + v = 13 • 15 – 6 = 9 true open false open true

  11. Definitions • Inverse operation – the opposite operation used to undo the first. • 4 + 3 = 7 7 – 4 = 3 • 6 x 6 = 36 36 / 6 = 6

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

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

  14. Solve these equations using the inverse operations 3 • n + 4 = 7 • n – 5 = 4 • n + 4 = 17 • n – 6 = 13 • n + 7 = 15 • n – 8 = 17 9 13 19 8 9

  15. Commutative Property • 5 + 4 = 9 4 + 5 = 9 • a + b = c b + a = c • 6 + 3 = 9 3 + 6 = 9 • x+ y = z y + x = z • 3 + 4 + 1 = 8 1 + 3 + 4 = 8

  16. Solve these equations using the commutative property n = 4 • n + 7 = 7 + 4 • m + 2 = 2 + 5 • z + 3 = 3 + 9 • g + 6 = 6 + 11 • s + 4 = 4 + 20 • c + 8 = 8 + 32 m = 5 z = 9 g = 11 s = 20 c = 32

  17. The Identity Property of Addition • 7 + 0 = 7 • a + 0 = a • 8 + 0 = 8 • c + 0 = c • 2 + 0 = 2

  18. Use the Identity Property of addition to solve these problems • n + 0 = 8 • b + 0 = 7 • m + 0 = 3 • v + 0 = 5 • w + 0 = 4 • r + 0 = 2 n = 8 b = 7 m = 3 v = 5 w = 4 r = 2

  19. Subtraction Rules of zero • 7 – 7 = 0 • n – n = 0 • 4 – 0 = 4 • n – 0 = n

  20. Find the value of n using the rules of subtraction • n - 8 = 0 • n – 9 = 0 • n – 0 = 7 • n – 0 = 9 • n – 7 = 0 • n – 0 = 5 n = 8 n = 9 n = 7 n = 9 n = 7 n = 5

  21. Write an equation for these problems using a variable • Timothy got 72 right on his timed test in July. He got 99 right on this same test in November. • Jasmin runs 15 minutes before school and 30 minutes after school. • One zinger costs 25 cents. Issak bought 4. 72 + n = 99 or 99 – 72 = n 15 + 30 = n 4 x 25 = n

More Related