Decimal Rule
Addition
Subtraction
Multiplication
Word Problems
100
How do you add decimals?
You line up the decimals and then add the numbers.
100
58.9 + 3.04 =
61.94
100
3.95 - 2.7 =
1.25
100
.6 x 2.1 =
1.26
100

Gabriela had $14.50. She spent $3.99 at the snack bar and $5.29 at the arcade. 

Does she have more or less than $7.00 left?

Less than $7.00

200
How do you subtract decimals?
You line up the decimals and then subtract the numbers.
200
.004 + 5.1 =
5.104
200
95.29 - 1.3 =
93.99
200
4.25 x 21 =
89.25
200

Ishaan and his friends have $40.00 to spend at a restaurant. They are deciding between a pizza place and a salad place. 

A large pizza costs $7.50.

How many large pizzas can they buy?

5 pizza (5-5.33)

300
What do you do if there are not enough digits in the top number to subtract a problem?
You have to add on zero's.
300
.9843 + 2.67 =
3.6543
300
125 - .68 =
124.32
300
.03 x .03 =
.0009
300

Tickets to a show cost $5.50 each for adults and $4.25 each for students. 

A family is purchasing 2 adult tickets and 3 student tickets. 

If the family pays $25.00, what is the exact amount of change they should receive

$1.25

25-23.75=1.25

400
How do you multiply decimals?
You multiply the numbers and then you count how many spaces there are to the right of the decimals and count them over to the left in the answer.
400
5 + 2.78 + .030 =
7.81
400
.468 - .059 =
.409
400
2.003 x .05 =
.10015
400

Tickets to a show cost $5.50 each for adults and $4.25 each for students. 

A family is purchasing 2 adult tickets and 3 student tickets.

What is the total cost?

$23.75

5.50*2+4.25*3=23.75

500
How do you divide decimals?
You have to get rid of the decimals on the outside by moving the decimals on the inside. Then bring the decimal straight up and divide normally.
500
8.07 + .0976 + 23.3 + 48 =
79.4676
500

2 - 0.378

1.622

500
.312 x 1.67 =
.52104
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