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Multiplication
Addition
Subtraction
Word Problems
Math Rule
100

0.3 x 5

What is 1.5

100

0.52 + 0.15

What is 0.67

100
0.67 - 0.34
What is 0.33
100
Amy saw a scarf that cost $14.52. She bought a pink, blue and white one. How much did she pay, not including tax?
$43.56
100

What do you do if there are not enough digits in the top number to subtract a problem?


Add zero's in the empty place values as place holders.

200

Where should the decimal be placed in the product of 

12.3 x 0.08 = 984

What is in front of the 9

200

0.75 + 1.324

What is 2.074

200
1.92 - 0.54
What is 1.38
200
Jon paid $2.45 for a sandwich, $1.00 for a bag of chips, and $1.50 for a soda. How much was his total?
$4.95
200

True or False:

When multiplying decimals, you first line up the decimals

False

300

If 152 x 12 = 1,824

What is 1.52 x 0.012

What is 0.01824

300

1.52 + 2.15

What is 3.67

300

52.31 - 9.4

What is 42.91

300
Jackie bought a shirt for $14.99. She paid with two ten dollar bills. How much change did she receive?
$5.01
300

Most students forget this last step after adding or subtracting decimals

Bring down the decimal

400
15.62 x 0.33
What is 5.0646
400
15.30 + 2.57
What is 17.87
400
207.2 - 54.6
What is 152.6
400
Jake ran 0.15 miles in 1 minute. How many miles did he run in 25 minutes?
3.75 miles
400

What is step #3 when multiplying decimals?

Count the total number of decimal places in your original factors

500

What is the error

2.5 x 0.11= 2.750

The decimal should be placed in front of the 2. The 0 in the thousandths place is not needed, and really leaves it as 2 decimal places when there should be 3 decimal places

500

0.0089 + 0.2

What is 0.2089

500

2.557 - 0.328

What is 2.229

500
Trenton paid $5.32 for his lunch and $6.78 for Makenzi's lunch. He paid with a twenty dollar bill. How much change did he receive?
$7.90
500

Moving the decimal to to the right is the same thing as...

Multiplying by 10