MathsBhanu · Class 4-5
Roti ke tukde, bhinn ka khel
Ek roti ko 2 barabar tukdon mein todo ya 4 mein — kis tareeke mein tumhe zyada roti milegi agar tum aadhi lo?
Socho pehle… phir dekho jawab
Barabar! Aadhi roti (1/2) aur chaar mein se do tukde (2/4) ek jaisi hi roti hain. Sirf tukde chhote-bade hain.
Jab ek poori cheez ko barabar hisson mein baant te hain, toh har hissa ek bhinn (fraction) hai. 1/4 matlab poori cheez ke 4 barabar hisse, aur unmein se 1. Neeche wali sankhya batati hai kitne hisse, upar wali batati hai kitne liye.
Cause-effect: jitne zyada hisse karoge, har hissa utna chhota hoga. Isliye 1/8 roti 1/4 roti se chhoti hai, bhale 8 bada number lage. Pizza ke 8 slice ho toh har slice patla hota hai.
Bhinn har jagah hai: aadha litre doodh, paav kilo (1/4 kg) tamatar, aadha ghanta khel. Barabar baantna hi bhinn ki jaan hai — tukde barabar nahi toh fraction galat! Agar ek bhai ko bada tukda mile aur doosre ko chhota, toh dono ko aadha-aadha nahi mila.
Ghar pe try karo
Ek chaukor kaagaz ko beech se modo — 2 hisse. Phir se modo — 4. Phir se — 8. Har baar kholkar gino aur ek hissa rangon. Dekho 1/2, 2/4 aur 4/8 ek hi jagah gherte hain.
Wow!
1/2 = 2/4 = 4/8 — teen alag naam, par roti utni hi!
Mummy-Papa ke liye
Aaj roti ya fal kaat te waqt bachche se poochhiye ki har tukda kaunsa bhinn hai.
3 sawaal
- Kaunsa hissa sabse bada hai?
Jawab dekho
1/2. Jitne kam hisse, har hissa utna bada. 1/2 matlab sirf 2 hisse.
- 2/4 kiske barabar hai?
Jawab dekho
1/2. 4 mein se 2 hisse lena, poore ka aadha lena hi hai.
- Paav kilo ka matlab kya hai?
Jawab dekho
1/4 kilo. Paav matlab chauthai, yaani 1 kilo ke 4 hisson mein se 1.
NCERT se jodo: NCERT Class 4-5 Maths — hisse aur poora (fractions)