Bracket aur Terms

Class 7 Maths · Chapter 2: Arithmetic Expressions · NCERT Ganita Prakash section 2.2

Seekho

Ek expression, do jawab? Ishaan 30 kanche laata hai; Neel 5 thaile laati hai, har ek mein 4 kanche. Ishaan likhta hai 30 + 5 × 4. Koi pehle jodta hai: 35 × 4 = 140. Koi pehle multiply karta hai: 30 + 20 = 50. Kahaani se 50 sahi hai. Jaise vaakya mein comma, waise maths ko niyam chahiye taaki expression ka ek hi matlab ho.

30 + (5 × 4) = 30 + 20 = 50

Bracket kehte hain "ye pehle karo". Tum ₹15 ka pen aur ₹56 ki copy kharidte ho aur ₹100 dete ho. Baaki paise 100 − (15 + 56) = 100 − 71 = ₹29. Bina bracket ke 100 − 15 + 56 = 141 aata, jitna diya usse bhi zyaada, jo bematlab hai!

100 − (15 + 56) = 29

Terms expression ke wo hisse hain jo + se jude hain. Unhe dhoondhne ke liye har ghataav ko inverse jodne mein badlo: 83 − 14 = 83 + (−14), to terms 83 aur −14 hain. Bina + wala guna ya bhaag ek term hai: 2 − 10 + 4 × 6 mein terms 2, −10 aur 4×6 hain.

2 − 10 + 4 × 6 = 2 + (−10) + 24 = 16

Maan nikaalne ka niyam: pehle bracket ke andar ka, phir har term (guna aur bhaag), phir saare terms jodo. To 30 + 5 × 4 = 30 + 20 = 50, aur 5 × (3 + 2) + 7 × 8 + 3 = 25 + 56 + 3 = 84.

5 × (3 + 2) + 7 × 8 + 3 = 84

Explore: ek term ya zyaada?

1. Har expression sort karo.

Yaad rakho

• Pehle bracket; phir har term; phir terms jodo.
• Terms + se jude hisse hain; ghatana = inverse jodna: 83 − 14 = 83 + (−14).

Quick check

39 − 2 × 6 + 11 ka maan kya hai?

1. 38
2. 232
3. 62
4. 16

Socho

33 bachche khel rahe hain; teacher kehti hain "5 ke group". Groups aur bache hue bachchon se ek expression likho.

Practice

Teen levels (easy, medium, hard) ke naye sawaalon se practice karo, kuch hands-on, hints aur hal ke saath. Topic poora karne ke liye pichhle 5 mein se 4 sahi karo.