Decimal Operations

What is the most important thing to remember when adding and subtracting decimal numbers?

• Line up your decimal and digits!

• Ignore the decimal and add the digits

• Round the decimal to the nearest whole number

• Multiply the decimal by 10

What is 20% of 80

• 160

• 16

• 1,600

• 400

What is the result of 74.852 + 86.376?

What is the result of 15.678 + 23.456?

What is 30% of 50?

• 15

• 25

• 20

• 10

Mrs. VanDuyn hung 125 Christmas ornaments on her Christmas tree. That's 75% of all of her ornaments. How many ornaments does she have?

345÷15=

3,588/23=

Match the shapes with their names

• pentagon

• 
• hexagon

• 
• sphere

• 
• trapezoid

• 
• cylinder

•