Book C4: Fundamentals of Fractions and Decimals

Fractions as a whole-part relationship
Fractions as a relationship between two natural numbers
3. Sum and difference of proper fractions with the same denominator
Understanding the 4th Prime Number
Answer and explanation

Why do we find computational learning boring?

Many parents believe that the only way to learn math is through continuous repetition, so they repeat the same content over and over again.
Children start out with interest, but as they repeat what they think they know over and over again, they lose interest.
Crucially, if you keep getting the same mistakes over and over again, your motivation to learn will inevitably decline.

Why do I keep making mistakes even after repeated learning?

Repeated learning is essential to improve your computational skills.
However, children who have only been repeatedly trained in calculation techniques from the beginning without properly understanding the principles of calculation lack the analytical and application skills, and thus continue to make the same type of mistakes.
Even children with a certain level of skill often repeat mistakes because they cannot concentrate when solving problems.

Why can't I concentrate?

This is because, up until now, we have been learning repetitive operations that only emphasize speed.
The pressure to solve problems as quickly as possible, even if they can be solved within a limited time, has the side effect of rushing to mechanical means.
So, you don't feel the need to think calmly or look at the problem carefully and think about it.

So how should I study?

Before starting to learn operations, we prepare for self-directed learning by stimulating interest and motivation, and then first learn the principles of why the operations in the subject are calculated the way they are.
Next, through repeated practice to the extent that you can properly understand the meaning of the principle, you will master the calculation process and increase your speed to a level where the calculation does not interfere with solving problems.
Finally, improve your accuracy by solving problems that include various elements that stimulate concentration, which can be lost with repeated repetition.
You can only truly improve your computational skills by going through the five-step learning process of [Preparation → Principle → Mastery → Speed ​​→ Accuracy].

Perfect your computational skills! Red Operation's 5-step computational learning system will take full responsibility.

[Textbook Structure]

Consists of 6 stages in total, 4 volumes per stage
C1 Addition and subtraction of three-digit numbers
C2 multiplication
C3 Division
C4 Fundamentals of Fractions and Decimals

[Recommended Grade]

3rd graders who need to learn basic operations