Question

Throughout the year, learners need a variety of ways to practice and reinforce their understanding of subtraction. Name the three concrete models of teaching subtraction. Choose one of the concrete models, and provide a detailed explanation of how it can be effectively employed to teach subtraction.

Please proceed with your choice of a concrete model and provide the explanation as requested.

Answer 1

Three concrete models for teaching subtraction include manipulatives, number lines, and part-whole representations, with the number line being especially effective in providing a clear visual representation of the concept.

Step-by-step explanation:

The three concrete models of teaching subtraction include the use of manipulatives like counters or blocks, number lines, and subtractive models or part-whole representations. Let's focus on using a number line as it provides a strong visual and spatial representation of subtraction that can enhance students' understanding. To effectively employ a number line, the instructor would first depict the whole amount on the number line. Then, the student would be encouraged to move leftward for each unit subtracted, visually illustrating the concept of 'taking away.' For example, if a student is asked to subtract 5 from 12, the student would find 12 on the number line and then count back 5 spaces to land on 7, demonstrating that 12 minus 5 equals 7.