Subtract numbers by finding the difference between them

ArithmeKit 3.9 from CanDoMaths presents a series of engaging mathematical exercises aimed at helping students develop their subtraction skills by finding differences between numbers. The activities encourage learners to identify matching pairs and solve problems with missing elements. For example, students are tasked to figure out what number, when added to 297, results in 306, and then to find the difference between 306 and 297. This approach reinforces the concept that subtraction is essentially the process of determining how much one number differs from another. The exercises include a variety of problems, where students are also prompted to create their own matching pairs challenge, encouraging creativity and deeper understanding of the subtraction process.

The resource further explores efficient calculation methods, such as using a number line to visually represent and solve subtraction problems. For instance, Colin suggests that counting on from 596 to 605 is the most efficient way to find the difference. Students are then invited to use a number line to demonstrate that the difference between 573 and 564 is the same as the difference between 583 and 574, illustrating the concept of consistent intervals. Additionally, the kit challenges students to use each digit from 0 to 9 exactly once to solve a series of subtraction puzzles, fostering critical thinking and problem-solving skills. These exercises not only improve students' numerical fluency but also help them understand the underlying principles of subtraction.