Order of Operations

1 Step

100

3 + 2

5

200

4 + 3

7

300

4 x 3

12

400

6 x 4

24

500

10 x 10

100

2 Steps

100

3 + 2 + 1

6

200

4 + 3 x 1

7

300

2 + 4 x 3

14

400

6 x 4 + 2 

26

500

10 x 10 + 2

102

1 Step with Variables

100

3a + 2a

5a

200

4a + 3a

7a

300

4a x 3

Answer: 12a

12a

400

6a x 4

24a

500

10a x 10

100a

2 Steps with Variables

100

3a + 2a + 1a

6a

200

4a + 3a + 1a

8a

300

2a + 4a + 3a

9a

400

6a + 4a + 2a

12a

500

10a + 10a + 2a

22a

Rounding

100

I have $1.08. I have approximately how many dollars? 

$1.00

200

I have $2.92. I have approximately how many dollars? 

$3.00

300

I have $199 dollars. I have approximately how many hundreds of dollars?

$200.

400

I have $28. I have approximately how many dollars?

$30.00.

500

I owe my friend Sam 50 cents, but I only have a dollar bill and 4 dimes. Should I give Sam the dollar bill or the 4 dimes?

The dollar bill.