Algebra ii

Definitions ,[object Object],[object Object],[object Object]

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

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

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

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

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

Are these equations true, false or open? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],false true open false open true

How to solve an addition equation ,[object Object],[object Object],[object Object]

How to solve a subtraction equation ,[object Object],[object Object],[object Object]

Solve these equations using the inverse operations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],3 9 13 19 8 9

Commutative Property ,[object Object],[object Object],[object Object],[object Object],[object Object]

Solve these equations using the commutative property ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],n = 4 m = 5 z = 9 g = 11 s = 20 c = 32

The Identity Property of Addition ,[object Object],[object Object],[object Object],[object Object],[object Object]

Use the Identity Property of addition to solve these problems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],n = 8 b = 7 m = 3 v = 5 w = 4 r = 2

Subtraction Rules of zero ,[object Object],[object Object],[object Object],[object Object]

Find the value of n using the rules of subtraction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],n = 8 n = 9 n = 7 n = 9 n = 7 n = 5

Write an equation for these problems using a variable ,[object Object],[object Object],[object Object],72 + n = 99 or 99 – 72 = n 15 + 30 = n 4 x 25 = n

Algebra ii

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Algebra ii