2.1 Sino-Korean vs. Native Korean Numbers, Counters, and Monetary Calculations

2.1 Sino-Korean vs. Native Korean Numbers, Counters, and Monetary Calculations

Core Principle: In South Korean industrial environments, mastering numbers is not merely an academic exercise—it is essential for operational safety, inventory control, and wage verification. The Korean language employs two completely distinct numerical systems: Sino-Korean (한자어 수사) derived from historical Chinese characters, and indigenous Native Korean (고유어 수사). Using the wrong system causes severe communication breakdowns on the factory floor and immediate score deductions on the EPS-TOPIK exam.

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1. System Allocation: When to Use Which System

The most fundamental challenge for EPS-TOPIK candidates is knowing which numerical system applies to a given real-world context. The rule of thumb depends on whether you are measuring abstract/mathematical dimensions or counting discrete physical entities.

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2. Sino-Korean Numbers (한자어 수사) & 4-Digit Currency Grouping

Sino-Korean numerals serve as the computational backbone for accounting, measurements, and temporal minutes.

Base Sino-Korean Numerals

• 1 to 10: 1 (일), 2 (이), 3 (삼), 4 (사), 5 (오), 6 (육), 7 (칠), 8 (팔), 9 (구), 10 (십)
• Tens: 20 (이십), 30 (삼십), 40 (사십), 50 (오십), 60 (육십), 70 (칠십), 80 (팔십), 90 (구십)
• Powers of Ten: 100 (백), 1,000 (천), 10,000 (만), 100,000 (십만), 1,000,000 (백만), 10,000,000 (천만), 100,000,000 (억)

The 10,000 (만) Base-Shift in Korean Currency

Western numbers group digits in intervals of three zeros using thousands (1,000), millions (1,000,000), and billions (1,000,000,000). However, traditional East Asian languages, including Korean, group numbers in units of four zeros based on 만 (10,000 / 10⁴) and 억 (100,000,000 / 10⁸).

On the EPS-TOPIK, test-takers frequently stumble when reading paycheck amounts or machine invoice values because the written Arabic commas do not align with spoken Korean units:

Western Comma Grouping:    2 , 1 5 6 , 8 8 0  (2 million, 156 thousand, 880)
Korean Unit Boundary:     [2 1 5] 만  [6 8 8 0] 원
Spoken Korean Breakdown:   이백십오만 (215만) + 육천팔백팔십 (6,880) 원
Correct Spoken Output:     이백십오만 육천팔백팔십 원 (2,156,880 KRW)

Practical Salary Slip (급여명세서) Reading Practice

Foreign workers under the E-9 visa must verify their gross earnings and deductions against their contract. Examine this realistic monthly earnings voucher:

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3. Native Korean Numbers (고유어 수사) & Classifier Morphology

Native Korean numbers count tangible objects, items, people, and elapsed hours. Memorizing these numerals from 1 to 99 is mandatory for factory inventory and workshop life.

Base Native Numerals and Tens

• 1 to 10: 1 (하나), 2 (둘), 3 (셋), 4 (넷), 5 (다섯), 6 (여섯), 7 (일곱), 8 (여덟), 9 (아홉), 10 (열)
• Tens: 20 (스물), 30 (서른), 40 (마흔), 50 (쉰), 60 (예순), 70 (일흔), 80 (여든), 90 (아흔)

Crucial Rule: Adnominal Mutations Before Counters (수관형사)

When Native Korean numbers precede a counting noun (단위 명사 / 의존 명사), the final syllable changes form. This affects five specific numerals:

하나 (1) → 한,   둘 (2) → 두,   셋 (3) → 세,   넷 (4) → 네,   스물 (20) → 스무

Notice how this functions in compound numbers:

• 21 boxes: 스물 + 하나 + 상자 → 스물한 상자 (Never 스물하나 상자)
• 32 people: 서른 + 둘 + 명 → 서른두 명 (Never 서른둘 명)
• 43 machines: 마흔 + 셋 + 대 → 마흔세 대 (Never 마흔셋 대)
• 54 sheets: 쉰 + 넷 + 장 → 쉰네 장 (Never 쉰넷 장)
• 20 pieces: 스무 개 (Note: '스물' drops the final 'ㄹ' exclusively before counters)

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4. Master Table of Workplace Counting Classifiers (단위 명사)

In Korean, you cannot simply say "three forklifts" as 셋 지게차. You must place the noun first, followed by the modified Native numeral and the specific classifier: [명사] + [수관형사] + [단위명사] (e.g., 지게차 세 대).

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5. Authentic Workplace Dialogue Transcripts

Dialogue A: Manufacturing Plant Inventory Count (공장 부품 재고 파악)

Setting: A small metal stamping plant in Gimpo. Production supervisor Park Ban-jang inspects incoming raw components with Thuan, an E-9 worker from Vietnam.

박 반장 (Supervisor Park): 투안 씨, 오늘 오전에 도착한 부품 상자 확인했어요? 모두 몇 상자 들어왔습니까? (Thuan, did you inspect the component boxes that arrived this morning? How many boxes came in altogether?)

투안 (Thuan): 네, 반장님. 큰 상자로 열두 상자 들어왔습니다. 작은 상자는 다섯 상자입니다. (Yes, Supervisor. Twelve large boxes arrived. As for small boxes, there are five boxes.)

박 반장 (Supervisor Park): 그래요? 상자 안에 전동 드릴은 몇 대 들어 있어요? (Really? How many electric drills are inside the boxes?)

투안 (Thuan): 전동 드릴은 한 상자에 네 대씩 들어 있어서 전부 마흔여덟 대입니다. 그리고 교체용 볼트도 스무 봉지 있습니다. (There are four electric drills per box, so there are 48 units in total. Also, there are 20 bags of replacement bolts.)

박 반장 (Supervisor Park): 수고했어요. 작업지시서 한 장 출력해서 선반 위에 올려놓으세요. (Great job. Please print one sheet of the work order and place it on top of the shelf.)

Dialogue B: Agricultural Livestock Supply Verification (축산 농가 사료 입고)

Setting: A swine farm in Anseong. Farm manager Lee Foreman checks feed supply delivery with Rith, an E-9 worker from Cambodia.

이 반장 (Foreman Lee): 리트 씨, 방금 트럭에서 사료 몇 포대 내렸어요? (Rith, how many sacks of feed did you just unload from the truck?)

리트 (Rith): 돼지 사료 서른 포대 내렸습니다. 소 사료는 열 포대 있습니다. (I unloaded thirty sacks of pig feed. There are ten sacks of cow feed.)

이 반장 (Foreman Lee): 영수증에 총금액이 얼마로 적혀 있어요? (How much is written as the total amount on the receipt?)

리트 (Rith): 총금액은 일백이십만 원(1,200,000원)입니다. (The total amount is 1,200,000 KRW.)

이 반장 (Foreman Lee): 맞네요. 사료 포대를 창고 1동 안쪽에 차곡차곡 쌓아 두세요. (That is correct. Stack the feed sacks neatly inside warehouse building 1.)

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6. EPS-TOPIK Question Traps & Common Distractors

1. Phonetic Traps in Listening (듣기):
   • Distinguishing 일 (1) and 이 (2): In noisy industrial audio recordings, 일 and 이 sound remarkably similar. Speakers often articulate 일번 with an unreleased lateral [일번] and 이번 with open resonance [이번]. Listen carefully for vowel openness.
   • Distinguishing 셋 (3) and 넷 (4) / 셋 (set) and 넷 (net): In rapid speech, the initial sibilant /s/ and nasal /n/ can blur. Memorize that 3 items will mutate to 세 개 while 4 items will mutate to 네 개.
2. The Classifier Mismatch Trap in Reading (읽기):
   • Questions may present an image of heavy machinery (e.g., three excavators or four presses). Options will test both number and counter:
     • Option A: 포클레인 세 명 (Incorrect: 명 is for people)
     • Option B: 포클레인 셋 개 (Incorrect: 셋 must mutate to 세, and machinery requires 대)
     • Option C: 포클레인 세 대 (Correct)
     • Option D: 포클레인 삼 대 (Incorrect: machinery counts require Native numbers, not Sino-Korean)
3. Accounting Subtraction Calculations:
   • Word problems frequently state: "창고에 상자가 50개 있었습니다. 오늘 18개를 출고했습니다. 남은 상자는 몇 개입니까?" (There were 50 boxes in the warehouse. Today 18 were shipped out. How many boxes remain?)
   • Candidates must perform mental subtraction (50 − 18 = 32) and identify the correct Korean representation: 서른두 개 (not 서른둘 개 or 삼십이 개).