Tarkib Adadi Repack May 2026

Tarkīb ʿAdadī (ترکیب عددي)

Beyond 11–19: The ‘Atf Connection

Grammarians extend tarkib adadi conceptually to numbers 21–99 when formed with wa (“and”), e.g., thalathah wa ‘ishrūna (twenty-three). While not a single indeclinable word, they share the property of the unit preceding the tens and the noun remaining singular accusative. However, true tarkib (construction) is reserved for 11–19, as the elements in 21–99 are separate words and inflect for case.

7. Common Errors

Using dual or plural for the maʿdūd: Incorrect: aḥada ʿashara kutubun (should be kitāban).
Declining the compound: Incorrect: aḥadi ʿashara (except in rare poetry).
Gender mismatch: Using aḥada ʿashrata with a masculine noun (wrong).
Forgetting 12’s declinability: Treating ithnā ʿashara like 13 in all cases (leads to ithnay ʿashari error – actually ithnay ʿashara is correct).

Advanced Tarkib Adadi: Multiplication and Fractions

Tarkib Adadi is not limited to addition. It extends into higher math. tarkib adadi

Daily Drills to Master Tarkib Adadi (5 Minutes a Day)

Consistency beats intensity. Implement these 5-minute warm-ups: Using dual or plural for the maʿdūd :

Flashcard Pairs: Show one part; student says the missing part to make 10.
Number Bond Template: Draw a blank bond with a whole. Students fill in two parts. Challenge: Write four different pairs.
Mental Math Bingo: Call out "The composition of 12 using 7." Students cover "5" on their bingo card.
"Fact Family" Triangles: A triangle with numbers 4, 5, 9. Students recite: 4+5=9, 5+4=9, 9-4=5, 9-5=4.

Part 1: What is a Composite Number? (Adad-e Morakkab)

Definition: A Composite Number is a positive integer (natural number) that has more than two factors. In simpler terms, it is a number that can be divided evenly by numbers other than just 1 and itself. and at least one other number

Key Rule:

If a number can be divided by 1, by itself, and at least one other number, it is a Composite Number.
If a number can only be divided by 1 and itself, it is a Prime Number (Adad-e Aval).

Tarkīb ʿAdadī (ترکیب عددي)

Beyond 11–19: The ‘Atf Connection

7. Common Errors

Using dual or plural for the maʿdūd: Incorrect: aḥada ʿashara kutubun (should be kitāban).

Declining the compound: Incorrect: aḥadi ʿashara (except in rare poetry).

Gender mismatch: Using aḥada ʿashrata with a masculine noun (wrong).

Forgetting 12’s declinability: Treating ithnā ʿashara like 13 in all cases (leads to ithnay ʿashari error – actually ithnay ʿashara is correct).

Daily Drills to Master Tarkib Adadi (5 Minutes a Day)

Consistency beats intensity. Implement these 5-minute warm-ups:

Flashcard Pairs: Show one part; student says the missing part to make 10.

Number Bond Template: Draw a blank bond with a whole. Students fill in two parts. Challenge: Write four different pairs.

Mental Math Bingo: Call out "The composition of 12 using 7." Students cover "5" on their bingo card.

"Fact Family" Triangles: A triangle with numbers 4, 5, 9. Students recite: 4+5=9, 5+4=9, 9-4=5, 9-5=4.

Part 1: What is a Composite Number? (Adad-e Morakkab)

Key Rule:

If a number can be divided by 1, by itself, and at least one other number, it is a Composite Number.

If a number can only be divided by 1 and itself, it is a Prime Number (Adad-e Aval).