# Activities

• • • ##### Subject Area

• Math: Elementary Math: Number Operations

• ##### Author K-5

1 Hours

• TI-10

#### Before the Activity

The teacher will model for the students' basic addition problems and how to use the TI-10 to check their answers.

Step by step instructions on how to enter numbers and operations to get the answer.

#### During the Activity

The students will break up into small groups of 4-5 students. The teacher will pass out TI-10's to all students in each group except one.

The student without a TI-10 will get a piece of paper and pencil.

The teacher will write a variety of addition problems for the whole class to see. The student who will be solving the problem using pencil/paper will use the strategy of their choice to solve the problem (manipulatives may be used).

Once that student has solved the problem, he/she will show their answer to the other students and explain the process they used to find the answer.

The students with the TI-10's will then calculate the problem on the calculators to check the answer.

This process will go on so that each students has a chance to solve a problem without a TI-10.

#### After the Activity

The students will share their problems with the class. explain the strategies they used to solve the problems and how the TI-10's were useful in checking answers.

• Evaluate whether or not they needed the TI-10's to check.

• Were manipulatives effective in solving or checking answers?