# order of operations

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## Presentation Transcript

### Slide 1:

Order of Operations ( ) + X - 43 ?

### The Order of Operations tells us how to do math problems with more than one operation, in the correct order. :

The Order of Operations tells us how to do math problems with more than one operation, in the correct order.

### Please Excuse My Dear Aunt Sally :

Please Excuse My Dear Aunt Sally This phrase will help you remember the order of operations.

### Please Excuse My Dear Aunt Sally :

Add + Subtract - Multiply x Divide ? Please Excuse My Dear Aunt Sally P E M D A S Parentheses ( ) Exponents 43

### Please Excuse My Dear Aunt Sally :

Please Excuse My Dear Aunt Sally Parentheses ( ) Always do parentheses 1st.

### Please Excuse My Dear Aunt Sally :

Please Excuse My Dear Aunt Sally Exponents 43 Always do Exponents 2nd.

### Please Excuse My Dear Aunt Sally :

Multiply x Divide ? Please Excuse My Dear Aunt Sally Do multiplication and division 3rd, from left to right.

### Please Excuse My Dear Aunt Sally :

Add + Subtract - Please Excuse My Dear Aunt Sally Do addition and subtraction 4th, from left to right.

### Slide 10:

Let’s Try Some ? Problems!

### PEMDAS :

PEMDAS 3+23- (9+1) 3+23- 10 3+8-10 11-10 1

### PEMDAS :

PEMDAS 3 (9+1) + 62 3(10)+62 3(10)+36 30+36 66

### PEMDAS :

PEMDAS 4+5 x (6-2) 4+5 x 4 4+20 24

### PEMDAS :

PEMDAS 4+ 10 x 23 -16 4+10 x 8 -16 4+ 80 -16 84-16 68

### PEMDAS :

PEMDAS 21 + 102 ? 10 21+100?10 21 + 10 31

### PEMDAS :

PEMDAS 10+72-2 x 5 10+49–2 x 5 10+49- 10 59 - 10 49

### PEMDAS :

PEMDAS 64 ? (9 x 3-19) 64?(27 –19) 64 ? 8 8

### Slide 18:

Have fun doing the Order of ? Operations!