4/22 Earth Day Averages: Math

To find the MEAN (average), you add then divide by the amount of numbers you added in the set... Which of these sets has an average of 70? Earth day was first recognized in 1970!

• 60, 60

• 70, 70

• 60, 70

• 70, 80

A plastic bottle can take 450 years to break down in a landfill. Which set adds up to 450?

• 100, 200, 150

• 100, 200, 200

• 150, 100, 100

• 200, 100, 100

Toilet paper tubes can take up to 2 months to decompose in a landfill.... Which has an average of 2? (ADD AND DIVIDE BY TOTAL AMOUNT OF NUMBERS!)

• 0+0+1+1+5 = 7, & 7/5 = 2

• 0+ 1+2+ 3+5= 11, & 11/5 = 2

• 0+ 2+1+4+1= 8, & 8/5 = 2

• 0+ 1+ 2 + 3+ 4= 10, & 10/5= 2

To conserve water, if we turn off the faucet when we brush our teeth, we can conserve up to this many gallons each day... Which data set has 8 as the maximum value (highest number)?

• 10, 8, 8, 7

• 6, 7, 8, 4

• 2, 9, 5, 8

• 8, 8, 8, 9

An estimate of 15 billion trees are cut down each year. We need them to have oxygen. Which data set has a minimum value (lowest number) of 15?

• 10, 15, 12, 19

• 15, 14, 19, 16

• 17, 18, 15, 16

• 19, 20, 18, 13

One tree can rid the air of up to 60 pounds of pollutants. Which is the correct way to find an average of 60?

• 60 + 60 + 60 = 180. Divide 180 by 2 to get 60.

• 60 + 60 + 60 = 180. Divide 180 by 3 to get 60.

• 60 + 60 + 60= 180. Multiply 180 by 3 to get 60.

71% of the Earth's surface is water. In which data set does the value 71 occur more often than any other number? (This would be the MODE or most frequent number for the set!)

• 71, 71, 72, 72

• 70, 71, 71, 70

• 70, 69, 68, 67

• 70, 71, 71, 71

Which of these is NOT TRUE and will not be a way to help our Earth?

• Taking shorter showers to reduce the amount of water used

• Turning off the faucet when you brush your teeth.

• Recycling cans and plastic

• Leaving your trash on the beach.

Which are ways we can conserve and help our Earth?

• Turn off excess lights at home and save electricity.

• Recycle items from our home.

• Turn off leaky faucets that waste water.

• Hang clothes out to use less electricity.

• ALL of these are ways to help conserve & can benefit our Earth.

Finding the AVERAGE of a set of numbers by adding and dividing is known as the ___________. Remember: Be kind to our EARTH and find easy ways to make it a better place! Happy Earth Day!

• Mode

• Range

• Median

• Mean