Organizing and Displaying Data

Mental Math Reflexes

•10+10•30+13•175+426

Mental Math Reflexes

•12+10•40+56•238+546

Mental Math Reflexes

•15+10•24+61•693+168

Math

• Guess how many raisins are in the box. Write your guess on your record sheet.• When you’re finished, share your

guess with your group.

In this lesson…

• You will gather, guess, estimate, organize, and summarize data on the number of raisins in the box.

• Count the number of raisins on the top. Use that number to estimate the number of raisins in the entire box.

•Write your estimate on your record sheet.

•Guess vs. Estimate

• Empty the box of raisins and count them.•Count twice to double check.•Write your answer on your

record sheet.

•What was your counting strategy?

•How many raisins did you count?

•Let’s organize our data using a line plot!

Landmarks

Landmarks

•Maximum—The largest number•Minimum—The smallest number• Range– The difference between the

Maximum and the Minimum•Mode—The most frequent number

What am I talking about?

• “Way out by itself”• “The smallest numbers”• “Big clump”• “The table has some holes.”

Finally…

•What would you say is the typical number of raisins in a box of raisins?