Solving Addition Solving Addition EquationsEquations

SWBAT solve addition SWBAT solve addition equations using the equations using the

subtraction property of subtraction property of equality equality

A DemonstrationA Demonstration

In groups you may come up as called In groups you may come up as called to examine the balance scalesto examine the balance scales

How can you determine how much How can you determine how much weight is in the unknown envelope?weight is in the unknown envelope?

Draw what you saw in the boxes Draw what you saw in the boxes provided.provided.

Solving EquationsSolving Equations

• Keep it balanced!!! Keep it balanced!!! • You can do anything you want to one You can do anything you want to one

side, as long as you do the SAME to the side, as long as you do the SAME to the otherother

• Isolate the variable.Isolate the variable.• Get the unknown by itself and the Get the unknown by itself and the

other side will tell you what it is worthother side will tell you what it is worth

ExamplesExamples

3.415 = 1.626 + s3.415 = 1.626 + s 0 + m = 2.30 + m = 2.3 4.263 = 4.263 + k4.263 = 4.263 + k 119 + 246 + f = 893119 + 246 + f = 893 1.1 + 1.83 + g = 6.251.1 + 1.83 + g = 6.25 2597 + x = 6233 2597 + x = 6233 y + 13.84 = 20.29 y + 13.84 = 20.29

Try the problems on your paperTry the problems on your paper

f = 528f = 528 n = 0.143n = 0.143 z = $5.25z = $5.25 g = 15g = 15 x = 1.25x = 1.25