# Activities

• • • ##### Subject Area

• Math: Elementary Math: Number Operations

• ##### Author K-5

40 Minutes

• TI-10
• ##### Other Materials
• Pencil
• Paper
• TI-10 Calculator

## The Number of Years

#### Activity Overview

Students' will chart the various ages of the other students in their classroom then the students will multiply the ages by 2 using a lower level calculator, they will then add up the total ages using the same calculator - they can now divide the class into two groups (boys/girls) and see which group has more total years - the last thing would be for the students to try to find a new way of coming up with the answer without multiplying all students by 2

#### Before the Activity

Have the students record all of the students ages that are in that class.

#### During the Activity

• Once the students have collected all the various ages they should each be given a TI-10 calculator

• Have the students multiply the ages of each student by 2

• The students should then add up their new total

• Now have the students look at the boys and girls as separate groups. Repeat the process

• Ask the students if there is an easier way to find the new totals without multiplying each students' age by 2
• #### After the Activity

Have students' explain to the class their new ways of coming up with their new totals.