Tarkib Adadi -
A: Yes. Search for "Number Bond games" or "Part-Part-Whole apps." Many free versions exist for Android and iOS that gamify decomposition practice. Keywords used: Tarkib Adadi, عددى ترکيب, numerical composition, number bonds, decomposition, mental math, part-part-whole, fact families, place value, primary mathematics.
Addition tables teach: "4 + 5 = 9" as an isolated fact. Tarkib Adadi teaches: "9 can be 4 and 5, but also 6 and 3, or 7 and 2, or 8 and 1, or 9 and 0." tarkib adadi
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A: Subtraction is finding a missing part. If a child knows 9 is composed of 6 and 3, then 9 - 6 = 3 is instantly obvious. A: Yes