ADDING THREE WHOLE NUMBERS LESSON PLAN
Write the problem 2 + 3 on the board, ask students to solve the problem. (5)
Now write 2 + 3 + 2 on the board. Ask students how this problem is the same as the problem they just solved. (2 + 3)
Explain that when you are adding three numbers you break the problem into two parts. You add the first two numbers (2 + 3) then add the next number to that answer (5 + 2). So the answer is 7.
Write the problem 1 + 4 + 3 on the board. Show students again how to break the problem into 2 parts. Adding the first part then adding the third number to that answer.
Write 4 + 2 + 5 on the board. Ask students what they should do first. (add 4 + 2) Then ask students what they should do next. (add 6 + 5) So the answer is 11.
Repeat as many times as the teacher deems necessary.
Use the worksheet to evaluate whether students understand the concept.
Math Lesson Plans, Worksheets,
For more teaching
material, lesson plans, lessons, and worksheets
please go back to the InstructorWeb home page.