# Calculator Strategies STO

# STO Given

# STO Answer

# STO 5 → x , 6 → y , 7 → z

# STO Given

# When we have an algebraic expression and asked to evaluate or simplify given the values.

## Note: Make sure you multiply if you see two letters in example (x•y) next to each others or you see parenthesis in example x•(c+6).

## We use it to find:

## to Evaluate an algebraic expression if you are given the values of the letters , example x=-1 , and y=-2 , Evaluate 2x-5y ?

## STO-Given STEPS :

### 1- Ctrl – N ( If it asks to if you want to save click No )

### 2- Add Calculator 1

### 3- Letter , Ctrl VAR , Number ( in example 5 → x ) Enter

### 4- Type the expression the way it looks – exactly

### Example 1:

### Solution 1:

# STO Answer

# We use it when we have an equations with answers in a multiple choices.

## We use it to find:

## Which answer is the true answer for an equation linear or quadratic.

# STO Answer STEPS:

### 1- Ctrl N

### 2- Add Calculator:1

### 3- start with the answer choices one at a time , number Ctrl VAR letter

### 4- type the equation the way it appears in the question

### 5- if it gives you TRUE , STOP. If it gives you false , store the next answer choice and so on until you get the right answer ( True )

### Note: When you have ± , it means it two numbers in example ±2 means 2 and -2.

### Example 1:

### Solution 1:

# STO 5 → x , 6 → y , 7 → z

## When we have an algebraic expression with letters and numbers , no equal sign !

## We use it to find:

## Which is equivalent expression to another expression.

# STO 5 → x , 6 → y , 7 → z STEPS:

## 1- Ctrl N

## 2- Add a Calculator

## 3- if you have only one letter such as x , you type 5 → x , if you have another letter you assign number 6 , and so on.

## 4- find the value of the expression and start typing the answer choices and whichever equivalent is the answer.

### Example 1:

### Solution 1:

### Example 2: ( More than one letter )

### Solution 2: