Addition and Subtraction Equations

Addition and Subtraction Equations

Una ecuación es como un equilibrio porque debes asegurarte de que ambos lados sean iguales.

Fill in the Blank

What is this?

• This is a tied knot

• Esto es un nudo atado

What do you think the goal of this picture is?

• To untie or undo the knot

• El objetivo de esta imagen es desatar o deshacer el nudo.

The Main Goal to Solving Equations:

• Isolate the variable/Aislar la variable

• Get the variable by itself/Obtener la variable por sí sola

• You can ONLY do this by UNDOING the operation/SOLO puede hacer esto DESHACER la operación

Solve using Inverse

 operations

• Inverse Operations undo each other

• The inverse/opuesto of addition/adición is...

• Subtraction/sustracción

• The inverse/opuesto of subtraction/sustracción is....

• Addition/adición

What does this Equation say???

• A number minus 3 equals 6.

• To isolate the variable we must perform the inverse operation of subtraction. Para aislar la variable debemos realizar la operación opuesto de resta.

• Adding 3 to both sides of the equal sign will balance this equation. Sumar 3 a ambos lados del signo igual equilibrará esta ecuación.

• X is equal to 9

What does this Equation say???

• A number plus 3 equals 6.

• To isolate the variable we must perform the inverse operation of addition. Para aislar la variable debemos realizar la operación opuesto de suma.

• Subtracting 3 to both sides of the equal sign will balance this equation. Restar 3 a ambos lados del signo igual equilibrará esta ecuación.

• X is equal to 3

Open Ended

You solve an equation by doing the __________ operation

Resuelves una ecuación haciendo la _______operación

Multiple Choice

a + 4 = 11

• a = 3

• a = 7

• a = 4

• a = 11

Multiple Choice

m - 7 = 1

• m = 8

• m = 6

• m = -6

• m = -8

Open Ended

Would you solve 5 + a = 11 differently from a + 5 = 11?

¿Resolverías 5 + a = 11 de manera diferente a a + 5 = 11?

Addition is...commutative!! It does not matter what order the numbers are in, they still show the same value. We still must isolate the variable by doing the opposite or inverse operation.

Open Ended

How do you solve equations that contain addition or subtraction?

¿Cómo resuelves ecuaciones que contienen suma o resta?