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Subtraction Action!

• Math
Arithmetic

K-2

### Brief Description

In this subtraction game, appropriate for students in grades 1 and 2, the teacher says a number between 1 and 19, and teams of students think of subtraction problems with that number as the answer.

### Objectives

Students become familiar with fact families and subtraction facts.

### Keywords

arithmetic, subtraction, fact families

none

### Lesson Plan

Organize children into teams of four, and provide the following instructions:

"Today we are going to play a subtraction game using numbers from 1 to 19. I will say a number, and each team has one minute to think of as many subtraction problems as possible that have the number I say as the answer. When the minute is up, I will go around the room, asking each team to tell me one of the problems the members have thought of. Each team will have ten seconds to say a problem and earn a point. If a team cannot think of a new problem in ten seconds, I will go to the next team. If a team gives an incorrect problem or a problem that has already been given, the team loses a point. The round ends when none of the teams can think of a new problem. The team with the most points after a predetermined number of rounds wins."

As each team gives a problem, write it on the chalkboard and ask the class whether it is correct.

You can record team points on a bar graph.

### Assessment

Administer a one-minute timed test on subtraction facts before playing the game, readminister the test after the game, and compare the scores.

### Submitted By

Barbara Davis, Milan Elementary School, Milan, Tennessee

Updated 7/10/2002

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