# Multi-Digit Addition/Subtraction Trading Card Lesson Plan

Subject: Math

Grade Level: 2nd & 3rd

Note:

• This lesson is written for addition but can be adapted for subtraction.
• This lesson is written for two digit numbers but can be adapted to use three digit numbers.
• This lesson uses the traditional algorithm.  Students should have a conceptual understanding of addition/subtraction before completing this lesson.

Objective:

• Students will be able to add/subtract two digit numbers with and without regrouping using the traditional algorithm.

Anticipatory Set:

• Write a two digit addition problem that requires regrouping on the board.
• Have students find the sum by using base ten blocks.
• Explain that students will be using the traditional algorithm to solve that same problem.

Instruction:

• Model writing the first number of the problem above the second number on the whiteboard.  Write the + sign and draw a line below the bottom number.
• Demonstrate how to add the ones digits, regroup to the tens column, and then add the tens digits.
• Continue modeling with more problems as needed.

Guided Practice:

• Write a two digit addition problem on the board and have the students copy it onto mini-whiteboards or paper.
• Have the students solve the problem and turn their whiteboards/paper to show you their answer.
• Continue practicing problems on whiteboards/paper until students have had a fair amount of practice with the concept.

Independent Practice:

• Pass out sports trading cards to each student making sure that each student gets a card that has several two digit numbers on the back.
• Have students choose 2 two digit numbers to practice adding.
• Have the students fill in the Multi-Digit Addition Worksheet with the problems that they use. (You may want to have more than one copy of the worksheet for each student.)

Closure:

• Call on a student to write one of their problems on the whiteboard.
• Have the student explain how to solve the problem as he/she is writing on the whiteboard.
• Continue to have students share their problems with the class in this way.

Extension Ideas:

• Have students add more than 2 two digit numbers together (ex. 34+56+92=)