We Distribute, Yet Things Multiply Worksheet and Video Notes on Distribution Properties & Identities

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Video 1 – Understand Distributive Properties with Examples

Video 2 – Understand Identities with Examples

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Class 8 Maths Worksheet – We Distribute, Yet Things Multiply

Ganita Prakash | Chapter 6 | Exam Preparation Worksheet

This worksheet covers the Distributive Property, Algebraic Identities, Expansion, Simplification and Fast Multiplication from Chapter 6 “We Distribute, Yet Things Multiply.”

Section A – Distributive Property

1Use the Distributive Property to find:
  1. 24 × 7
  2. 36 × 12
  3. 48 × 15
  4. 125 × 32
2Rewrite each expression using the Distributive Property.
  1. 17 × 98
  2. 25 × 49
  3. 32 × 101
  4. 45 × 99
3Simplify using the Distributive Property:
  1. 7(x + 5)
  2. 9(a + 4)
  3. 6(p − 3)
  4. 12(2x + 5)

📐 Section B – Identity 1A

Identity 1A:
(a + b)2 = a2 + 2ab + b2
4Expand using Identity 1A:
  1. (x + 5)2
  2. (a + 7)2
  3. (2x + 3)2
  4. (3p + 4)2
5Find the value using Identity 1A:
  1. 252
  2. 1022
  3. 492
  4. 1032
6If x + 1/x = 5, find x2 + 1/x2.

📐 Section C – Identity 1B

Identity 1B:
(a − b)2 = a2 − 2ab + b2
7Expand using Identity 1B:
  1. (x − 4)2
  2. (a − 6)2
  3. (2x − 5)2
  4. (3p − 2)2
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8Find the value using Identity 1B:
  1. 982
  2. 972
  3. 482
  4. 9992
9If x − 1/x = 3, find x2 + 1/x2.

📐 Section D – Identity 1C

Identity 1C:
(a + b)(a − b) = a2 − b2
10Simplify using Identity 1C:
  1. (x + 5)(x − 5)
  2. (a + 8)(a − 8)
  3. (2x + 3)(2x − 3)
  4. (5p + 4)(5p − 4)
11Calculate using Identity 1C:
  1. 98 × 102
  2. 45 × 55
  3. 97 × 103
  4. 996 × 1004
12Find the value of:
  1. 512 − 492
  2. 1022 − 982

📐 Section E – Product of Two Binomials

Identity:
(a + m)(b + n) = ab + mb + an + mn
13Expand using the identity:
  1. (x + 2)(y + 3)
  2. (a + 4)(b + 5)
  3. (p + 3)(q − 2)
  4. (2x + 3)(x + 5)
14Expand and simplify:
  1. (x + 7)(x + 2)
  2. (x − 3)(x + 5)
  3. (2a + 1)(3a + 4)
  4. (3p − 2)(2p + 5)

⚡ Section F – Fast Multiplication Using the Distributive Property

15Calculate using the Distributive Property:
  1. 3874 × 11
  2. 5678 × 11
  3. 2456 × 101
  4. 832 × 1001
16Calculate mentally using a suitable distributive form:
  1. 89 × 101
  2. 949 × 101
  3. 265831 × 1001
  4. 1111 × 1001
17Use the Distributive Property to calculate:
  1. 9734 × 99
  2. 23478 × 999
  3. 567 × 999
  4. 428 × 99

Section G – Mixed Exam Practice

18Choose the correct identity for each expression:
  1. (x + 7)2
  2. (x − 9)2
  3. (x + 5)(x − 5)
  4. (a + m)(b + n)
19Fill in the blanks:
  1. (a + b)2 = a2 + ______ + b2
  2. (a − b)2 = a2 − ______ + b2
  3. (a + b)(a − b) = ______ − b2
  4. a(b + c) = ______ + ______
20Expand and simplify:
  1. (x + 6)2
  2. (2x − 7)2
  3. (3a + 2)(3a − 2)
  4. (x + 4)(x + 9)
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21Find the value without using long multiplication:
  1. 992
  2. 1012
  3. 48 × 52
  4. 997 × 1003
22If x + 1/x = 6, find:
  1. x2 + 1/x2
23If x − 1/x = 5, find:
  1. x2 + 1/x2
24Simplify using suitable identities:
  1. (x + 10)2 − x2
  2. (x + 6)(x − 6)
  3. (x + 3)2 − 6x
  4. (x − 5)2 + 10x
25Challenge Question ⭐

If x + 1/x = 4, find the value of

x2 + 1/x2.

🎯 Exam Challenge

26Without directly multiplying, find:
  1. 999 × 1001
  2. 1002 × 998
  3. 49 × 51
  4. 9998 × 10002
27Simplify:

(x + 5)2 − (x − 5)2

28Using an appropriate identity, find the value of:

1032 − 972

📌 Revision Tip: Before solving each question, identify which property or identity will make the calculation easier.

📚 Topics Covered

  • Distributive Property
  • Identity 1A – (a + b)2
  • Identity 1B – (a − b)2
  • Identity 1C – (a + b)(a − b)
  • (a + m)(b + n) Identity
  • Expansion and Simplification
  • Fast Multiplication using ×11, ×101 and ×1001
  • Fast Multiplication using ×99 and ×999
  • Identity-based Exam Questions

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