Kabhi number 100/1000 nahi hota — jaise 83 − 19. Post 1.1 mein CharuMam ne tip di thi: pehle 20 ghatao, phir 1 wapas jodo. Aaj yahi round se ghatao poori tarah, paise/bill ke saath!
⏱ Before Timer: Pehle Purane Tareeke Se
Pehle school wala column (ghatana) yaad kar lein. 83 − 19 column mein:
Udhaar: ikai mein 3 se 9 nahi ghatta. Left se 1 dahai = 10 ikai le lo. Ab ikai 13 − 9 = 4. Dahai mein ab 7 bache: 7 − 1 = 6. Jawab 64.
Aaj ki trick isse tez hai: pehle round 20 ghatao, phir 1 wapas jodo — neeche timer pe try karo.
Ab phone ya ghadi mein stopwatch (samay naapne wali ghadi) chalu kijiye. Neeche wala sawaal isi school wale tareeke (column method) se kijiye, copy-pencil ke saath. Column method na aata ho to ungliyon pe gin kar bhi kar sakte hain. Jaise hi jawab mil jaaye, stopwatch rok dijiye aur apna time likh lijiye.
Mera time: ______ second
Jawab dekho
83 − 19 = 64
Abhi trick nahi dekhni! Post ke end mein After Timer mein yahi sawaal trick se karenge aur dono time ki tulna karenge. 😊
— 📌 charumam.com
✅ Pehle Yeh Aata Hai
Ghatana = nikaalna. Round = 10, 20, 30, 50, 100… Aaj “thoda zyada ghatao, phir wapas jodo”.
📖 Shabd jo is post mein aayenge
- Round number: 10, 20, 30, 40, 50, 100, 200 jaisa end pe 0.
- Zyada ghataana: 19 ki jagah 20 ghatao — 1 zyada nikaal diya.
- Wapas jodna (+1): jo zyada nikaala tha, utna wapas add karo.
- Kyun +1?: 19 matlab 20 se 1 kam. Isliye pehle 83 − 20 karo, phir +1 (jo zyada nikaala tha) — milkar 83 − 19.
- Bill / change: total daam ghatana, note se wapas.
- Post 1.1 link: wahi “jitna ek ko diya/liya” soch, ghatane pe.
📏 Bade numbers padhna aur round number mein jodna
Har digit ki ek jagah (place) hoti hai. Right se gino: pehli jagah Ikai (ones, 1 wale), uske left mein Dahai (tens, 10 wale), phir Saikda (hundreds, 100 wale), phir Hazaar (thousands, 1000 wale).
10 ka bundle: 10 ikai = 1 dahai (10). 10 dahai = 1 saikda (100). 10 saikde = 1 hazaar (1000). Har jagah apne right wali jagah se 10 guna badi hai.
| Number | Kaise padhein | Kis cheez se bana |
|---|---|---|
| 98 | attaanve | 9 dahai (90) + 8 ikai |
| 165 | ek sau painsath | 1 saikda (100) + 6 dahai (60) + 5 ikai |
| 999 | nau sau ninyaanve | 9 saikde (900) + 9 dahai (90) + 9 ikai |
| 1011 | ek hazaar gyaarah | 1 hazaar (1000) + 0 saikda + 1 dahai (10) + 1 ikai |
Round number mein chhota number jodna (place box niyam): chhote number ko right se likho, yaani ikai ke neeche ikai, dahai ke neeche dahai. Phir har dabbe mein jo hai, woh jawab mein utaar do. Ek digit wala number sirf ikai ka zero badalta hai, do digit wala ikai aur dahai dono.
- 100 + 65: 65 mein do digit, to 6 dahai mein aur 5 ikai mein: 1|6|5 = 165.
- 100 + 2: 2 sirf ikai mein, dahai ka 0 waise hi rehta hai: 1|0|2 = 102 (12 nahi, 120 nahi!).
- 200 + 6: 6 sirf ikai mein: 2|0|6 = 206.
- 1000 + 11: 11 mein do digit, to 1 dahai mein aur 1 ikai mein: 1|0|1|1 = 1011.
🔁 Chhota sa warm-up
- 83 − 20 = ?
- 63 + 1 = ?
- 20 mein se 19 ghatane pe kya bachta?
- 64 + 19 = ?
Answers dekho
- 63
- 64
- 1
- 83
Yehi chain aaj ki trick hai!
— 📌 charumam.com
🎬 Kahani: Kabir Ki Cycle Shop
Kabir ne lock kharida ₹19. Pocket mein ₹83 the (birthday money).
Woh sochne laga: “3 se 9 nahi ghatta…” Tab dost bola: “Pehle 20 maan lo! 83 − 20 = 63, phir 1 wapas — 64 bachenge.”
CharuMam: “Sahi! Round se ghatao, farq wapas jodo. Aaj bill aur change pe bhi lagayenge.” 🪙
— 📌 charumam.com
🪄 Trick Step by Step: Round Se Ghatao, Farq Wapas Jodo
💡 Is post ki ek badi baat: Jab ghataane wala number round ke 1–3 kam ho (19, 29, 38…), pehle paas wala round ghatao, phir jo zyada ghataaya utna wapas jodo.
Step 1: Paas wala round dhoondho
83 − 19. 19 ke paas 20 (1 zyada).
Step 2: Round ghatao
83 − 20: 10-10 peeche — 83 → 73 → 63. Round ghatana aasaan (ikai same, dahai digit 2 kam: 8 → 6).
Step 3: Farq wapas jodo
20 − 19 = 1 zyada ghataaya. Isliye 63 + 1 = 64.
Step 4: Check
64 + 19 = 83 ✅
Rule ek line
83 − 19 = 83 − 20 + 1
19 matlab 20 se 1 kam. Pehle 20 ghatao (aasaan), phir 1 wapas jodo. Har sawaal pe: pehla − round + farq.
Aur examples
| Sawaal | Round | Kadam | Jawab |
|---|---|---|---|
| 83 − 19 | 20 | 63 + 1 | 64 |
| 56 − 28 | 30 | 26 + 2 | 28 |
| 72 − 39 | 40 | 32 + 1 | 33 |
| 90 − 47 | 50 | 40 + 3 | 43 |
| 65 − 18 | 20 | 45 + 2 | 47 |
Bill / change mix
Do items ₹35 + ₹28 = ₹63 (Post 2.1). ₹100 note: change = 100 − 63 = ₹37 (Post 3.1 complement!). Round-trick + complement saath.
Kab seedha complement? Agar pehla number 100 ya 1000 ho — Post 3.1/3.2 tez. Agar pehla number “normal” ho aur doosra round-paas — yahi Post 3.3.
🆘 Atak gaye? Aise socho
- Kaunsa round? Doosre number se upar wala agla number jiske end mein 0 ho (20, 30, 40…): 19→20, 28→30, 47→50.
- Farq wapas jodna bhool? “Zyada nikaala to wapas do” zor se bolo.
- 28 → 30 to farq 2: 20 − 19 jaisa: 30 − 28 = 2. 56−30=26, +2=28.
- Check hamesha: jawab + jo ghataaya = pehla.
— 📌 charumam.com
🔍 Yeh Kaam Kyun Karta Hai?
Paise se socho: maan lo tumhe ₹19 dene hain. Agar tumne ₹20 de diye (round, aasaan), par sirf ₹19 dene the, to ₹1 wapas milna chahiye.
Wahi hisaab yahan: 83 mein se pehle 20 nikaalo (= 63), phir 1 wapas jodo (= 64). Kyunki 20 − 19 = 1 farq.
Isliye 83 − 20 + 1 = 63 + 1 = 64.
Post 1.1 jod mein: ek ko +1, doosre se −1, total same. Yahan ghatane mein: round pe jaakar farq wapas. Neeche diagram.
— 📌 charumam.com
✏️ Solved Examples (Har Ek Normal Tareeke Se Check)
Example 1: 56 − 28 = ?
28→30. 56−30=26. +2 → 28.
✔️ Normal tareeke se check: 28 + 28 = 56 ✅
Example 2: 72 − 39 = ?
39→40. 72−40=32. +1 → 33.
✔️ Normal tareeke se check: 33 + 39 = 72 ✅
Example 3: 65 − 18 = ?
18→20. 65−20=45. +2 → 47.
✔️ Normal tareeke se check: 47 + 18 = 65 ✅
Example 4: Bill ₹47 + ₹29 = ?, ₹100 se change?
47+29: 40+20=60, 7+9=16 → ₹76. Change 100−76: 9−7=2, 10−6=4 → ₹24.
✔️ Normal tareeke se check: 76+24=100; 47+29=76 ✅
— 📌 charumam.com
🕉️ Vedic Maths Connection
Yeh general mental maths hai, koi alag Vedic sutra nahi. Haan, Nikhilam (3.1–3.2) bhi “round base” family mein hai — wahan base fix 100/1000, yahan base aap chunte ho (20, 30, 40…).
— 📌 charumam.com
🧭 Kab Use Karein, Kab Nahi
| Situation | Trick use karein? | Kyun |
|---|---|---|
| Doosra number 19, 29, 38, 49 jaisa | ✅ Haan | Round 1–3 door. |
| Pehla 100/1000 | ⚠️ 3.1/3.2 behtar | Complement tez. |
| Doosra pehle se round (20, 40) | ✅ Seedha | Sirf round ghatao; farq 0 (kuch wapas nahi). |
| Dono messy (43−27) | ⚠️ Tukdon mein | 27 = 20 + 7: pehle 20 ghatao, phir 7. |
| Exam sheet steps | ❌ Likhne mein nahi | Rough OK. |
— 📌 charumam.com
❌→✅ Common Mistakes
Galti 1: Farq jodne ki jagah ghata diya
83−19 ❌ 63−1=62. ✅ +1 → 64. “Zyada nikaala to wapas jodo.”
Galti 2: Galat round
56−28 ❌ 50 se: mushkil. ✅ 30 (paas upar).
Galti 3: Check nahi
Hamesha jawab + jo number ghataaya = shuru wala number.
🧠 Rule of thumb: Round se zyada ghataaya? Utna wapas jodo. Check: sum = pehla number.
— 📌 charumam.com
🏃 Speed Drill: 15 Sawaal, Timer Ke Saath
15 sawaal round-subtraction. Target: 3–4 minute.
- 83 − 19 = ?
- 56 − 28 = ?
- 72 − 39 = ?
- 65 − 18 = ?
- 90 − 47 = ?
- 44 − 19 = ?
- 81 − 29 = ?
- 53 − 18 = ?
- 76 − 39 = ?
- 62 − 28 = ?
- 95 − 49 = ?
- 70 − 19 = ?
- 88 − 29 = ?
- 41 − 18 = ?
- 67 − 39 = ?
Mera time: ______ · Sahi: ____ / 15
Answers dekho (pehle khud karo!)
- 64
- 28
- 33
- 47
- 43
- 25
- 52
- 35
- 37
- 34
- 46
- 51
- 59
- 23
- 28
— 📌 charumam.com
⏰ One-Minute Challenge
Sirf 1 minute (60 second). Timer lagao, aur jitne ho sakein utne sawaal mann mein (bina copy ke) karo. Sirf jawab likhna hai.
- 54 − 19 = ?
- 63 − 28 = ?
- 75 − 39 = ?
- 82 − 18 = ?
- 91 − 47 = ?
- 48 − 29 = ?
- 66 − 19 = ?
- 77 − 28 = ?
- 85 − 39 = ?
- 52 − 18 = ?
| Rating | Kitne sahi, kitne time mein |
|---|---|
| 🌱 Beginner | 60 second mein 5 se 7 sahi. Badhiya shuruaat! |
| 🚀 Pro | 60 second mein 8 ya 9 sahi |
| 🏆 Champion | 10 mein 10 sahi, 60 second ke andar |
Answers dekho
- 35
- 35
- 36
- 64
- 44
- 19
- 47
- 49
- 46
- 34
5 se kam sahi? Koi baat nahi! Trick wala section ek baar aur padho aur kal phir try karo. Har din thoda better, bas yahi chahiye. 💪
— 📌 charumam.com
📝 10 MCQs (Har Option Ka Kaaran)
MCQ matlab ek sawaal ke chaar jawab (options) diye hote hain, unme se ek sahi chunna hai.
Q1. 83 − 19 mein pehle kya ghataayein?
Jawab aur kaaran dekho
Sahi jawab: (c) 20
- (a) galat ❌: 10 ghataane se 19 poora nahi hota; paas round 20 chahiye.
- (b) galat ❌: 83 to pehla number hai — use mat ghatao, usme se ghatao.
- (c) sahi ✅: 19 ke paas round 20 hai — pehle wahi ghatao.
- (d) galat ❌: 19 seedha column se bhi hota hai, par slow; trick mein pehle 20.
Q2. 83 − 19 = ?
Jawab aur kaaran dekho
Sahi jawab: (b) 64
- (a) galat ❌: 74 = 83 − 9; yahan 19 tha.
- (b) sahi ✅: 63+1=64.
- (c) galat ❌: 62 tab jab +1 ki jagah −1 kiya.
- (d) galat ❌: 63 bina +1 — farq wapas jodna bhool.
Q3. 19 ek kam hai 20 se, isliye 83 − 19 =
Jawab aur kaaran dekho
Sahi jawab: (a) 83 − 20 + 1
- (a) sahi ✅: 19 = 20 − 1, to 83 − 19 = 83 − 20 + 1.
- (b) galat ❌: +1 ki jagah −1 mat: zyada nikaala tha, wapas jodo.
- (c) galat ❌: Yeh ghatana hai, 83 + 20 nahi.
- (d) galat ❌: 20 − 83 ulte order; pehla number 83 hai.
Q4. 56 − 28 mein farq kitna hai?
Jawab aur kaaran dekho
Sahi jawab: (d) 2
- (a) galat ❌: 1 tab hota jab number 29 hota (30 − 29).
- (b) galat ❌: 0 tab jab pehle se round ho (jaise 30 − 30).
- (c) galat ❌: 8 number 28 ka ikai digit hai, farq nahi.
- (d) sahi ✅: 28 ke paas round 30; 30 − 28 = 2 farq.
Q5. 72 − 39 = ?
Jawab aur kaaran dekho
Sahi jawab: (c) 33
- (a) galat ❌: 31 tab jab +1 ki jagah −1.
- (b) galat ❌: 43 = 72 − 29; yahan 39 tha.
- (c) sahi ✅: 39→40: 72−40=32, +1 → 33.
- (d) galat ❌: 32 bina +1 — farq wapas jodna bhool.
Q6. ₹100, items 35+28. Change?
Jawab aur kaaran dekho
Sahi jawab: (b) ₹37
- (a) galat ❌: 47 = 100−53; yahan total 63 → change 37.
- (b) sahi ✅: 35+28=63, phir 100−63=37 (Post 3.1).
- (c) galat ❌: 63 bill ka total hai, change nahi.
- (d) galat ❌: 27 = 100−73 jaisa; yahan total 63.
Q7. Kab complement (3.1) behtar?
Jawab aur kaaran dekho
Sahi jawab: (a) Pehla number 100 ho
- (a) sahi ✅: Pehla number 100/1000 ho to complement (3.1/3.2) tez.
- (b) galat ❌: 83 − 19 pe round-trick (3.3) behtar.
- (c) galat ❌: Hamesha nahi — pehla 100/1000 ho tab.
- (d) galat ❌: Kabhi-kabhi haan, jab pehla 100/1000 ho.
Q8. 65 − 18 = ?
Jawab aur kaaran dekho
Sahi jawab: (d) 47
- (a) galat ❌: 45 bina +2.
- (b) galat ❌: 43 tab jab +2 ki jagah −2.
- (c) galat ❌: 48 = 65 − 17; yahan 18 tha.
- (d) sahi ✅: 18→20: 65−20=45, +2 → 47.
Q9. Rule of thumb?
Jawab aur kaaran dekho
Sahi jawab: (c) Zyada nikaala to wapas jodo
- (a) galat ❌: Check zaroori: jawab + jo ghataaya = pehla.
- (b) galat ❌: Sirf 100 pe nahi — kisi round (20, 30, 40…) pe.
- (c) sahi ✅: Jo farq zyada nikaala (jaise 20 − 19 = 1), utna wapas jodo.
- (d) galat ❌: Hamesha −1 nahi — farq 1, 2 ya 3 ho sakta (19→20, 28→30, 47→50).
Q10. 90 − 47 = ?
Jawab aur kaaran dekho
Sahi jawab: (b) 43
- (a) galat ❌: 37 = 90 − 53, bilkul alag sawaal.
- (b) sahi ✅: 47→50: 90−50=40, farq 3 wapas: 40+3=43.
- (c) galat ❌: 40 bina farq (+3) wapas jode — 50 − 47 = 3 bhool.
- (d) galat ❌: 53 tab jab 90 − 37 socha, ya farq galat taraf; yahan 47 tha to 43.
— 📌 charumam.com
🧠 Challenge: HOTS Aur Olympiad Style
HOTS matlab Higher Order Thinking Skills, yaani aise sawaal jinme sirf trick nahi, thoda dimaag bhi lagana padta hai. Olympiad ek maths competition (pratiyogita) hota hai.
Q1. 83 − 19 − 19. Do baar round?
Solution dekho
19+19=38. 83−38: 38→40, 83−40=43, +2 → 45. Ya 64−19=45.
Check: 45+19+19=83 ✅
Q2. Number □□ aisa ki □□ − 29 = 44. □□?
Solution dekho
□□ = 44 + 29 = 73. (Jod: 40+20=60, 4+9=13 → 73.)
Q3. Bill 18+29+39, ₹100 change.
Solution dekho
18+29=47, +39=86. Change 100−86: 9−8=1, 10−6=4 → ₹14.
Q4. Kyun 43 − 27 pe round 30 thoda kam tez? Alternative?
Solution dekho
27 → 30 pe farq 3 hai (30 − 27 = 3) — zyada wapas jodna padta hai, isliye thoda slow. Doosra tareeka: 43 − 20 = 23, phir 23 − 7 = 16 (27 = 20 + 7). Round se: 43 − 30 = 13, +3 = 16. Dono jawab same; jo aasaan lage woh chuno.
— 📌 charumam.com
🎯 Exam Mein Kahan Kaam Aayega?
| Exam | Kahan kaam aayega |
|---|---|
| School | Money word problems, “kitna bacha”. |
| Olympiad | Adjust-to-round reasoning. |
| NTSE | Fast mental subtraction (mann mein, bina copy ke). |
| SSC / Bank | Change & bill totals. |
Shabdon ka matlab: Olympiad = school ke bachchon ki maths pratiyogita (competition). NTSE = Class 10 ke bachchon ka ek national scholarship (vazifa) exam. SSC / Bank exam = badon ke sarkari naukri ke exam.
— 📌 charumam.com
👩🏫 CharuMam Ka Tip
Ghatate waqt boliye: “Pehle bees… phir ek wapas!” Haath pe +1 dikhao. Dukaan pe practice free hai! 🪙
— 📌 charumam.com
⏱ After Timer: Ab Trick Se!
Wahi sawaal jo shuru mein kiya tha. Stopwatch phir chalu kijiye, aur is baar aaj ki trick se kijiye:
Trick se kaise karein (dekho)
19 ke paas round 20. 83 − 20 = 63 (83→73→63). 1 zyada ghata diya, to +1: 63 + 1 = 64 ✅
| Before time | After time | Kitna tez? |
|---|---|---|
| ____ second | ____ second | Before − After = ____ second bache! |
Pehli baar mein time zyada bhi lag sakta hai, ghabraiye nahi! Nayi trick ko 3 se 4 din ki practice chahiye. Phir yeh purane tareeke se kaafi tez ho jaati hai. 🚀
— 📌 charumam.com
🤖 Aur Practice: AI Tutor Se Poochho
Neeche wali line copy kijiye aur CharuMam AI Tutor (tutor.charumam.com) mein paste kar dijiye. Tutor aapko naye sawaal dega aur galti hone pe samjhayega:
— 📌 charumam.com
❓ FAQs (Bachchon Ke Asli Sawaal)
1. 1.1 tip se farq?
Wahi idea; yahan poori practice + bill mix + 3.1 complement saath.
2. Farq 4 ya 5 ho to (jaise 46 → 50)?
Chalta hai, par wapas 4–5 jodna thoda bhari pad sakta hai. Aisa ho to number tod kar socho: 46 = 40 + 6, pehle 40 ghatao phir 6. Aksar farq 1, 2 ya 3 (19→20, 28→30, 47→50) sabse aasaan rehta hai.
3. Jawab 0 se chhota (negative) ho jaaye?
Negative matlab 0 se chhota number. Example: 19 − 83 — yahan pehla chhota hai. Pehle dekho kaun bada hai; Class 6–8 ke sawaal mein aksar pehla number bada hota hai (jaise 83 − 19).
4. Agla post kya hai?
Agle post mein 3.1, 3.2 aur 3.3 ki tricks milakar tricky sawaal aur HOTS aayenge.
— 📌 charumam.com
🟢 Recap: Aaj Kya Seekha
- Round paas ho to: pehla − round + farq.
- 83 − 19 = 83 − 20 + 1 = 64.
- Farq = round − actual (20−19=1).
- 100/1000 pe complement tez.
- Bill: pehle jod, phir change.
- Check: jawab + ghataaya = start.
— charumam.com 🎯
👉 Aage Kya?
Chapter 3 ka final: Subtraction Ke Tricky Sawaal — 3.1, 3.2, 3.3 ka mix, HOTS aur paheliyaan!
Koi doubt? CharuMam AI Tutor se poochho, ya comment mein likho! 💬
💛 Post Achha Laga? Like, Share, Subscribe, Follow!
Agar aaj kuch naya samajh aaya, to post ko like kijiye, apne doston aur class ke group mein share kijiye, aur roz nayi trick ke liye humein subscribe aur follow kijiye! 🙏
- 🌐 Website: charumam.com
- 🤖 AI Tutor (doubt poochho, 24×7): tutor.charumam.com
- ▶️ YouTube (subscribe): @charumamofficial
- 📸 Instagram (follow): @charumamofficial
- ✈️ Telegram: t.me/charumam
- 💬 WhatsApp Channel: CharuMam WhatsApp Channel
— 📌 charumam.com
