Page 60 - Touchpad Mathematics_Ver1.0_C4

E:\Working\Orange_Education\TouchPad_Maths_4\Open_Files\Chap_03\Chap_03
\ 10-Nov-2025 Bharat Arora Proof-8 Reader’s Sign _______________________ Date __________

Mental Maths

Choose the correct option. Century #Computational Thinking
21 st
Skills
1. 100 × 100 = ___________
a. 20000 b. 1000 c. 10000 d. 200

2. 100 × 25 × ___________ = 0
a. 3 b. 1 c. 0 d. 10

3. (42 × 16) × 8 = 42 × (16 × ___________)
a. 8 b. 7 c. 6 d. 10

4. 35 × 700 = ___________
a. 75,000 b. 35,000 c. 24,500 d. 23,500

5. 48 × (24 × ___________ ) = (48 × 24) × 20
a. 70 b. 20 c. 24 d. 48

6. ___________ × 1000 = 1000 × 9999
a. 99 b. 999 c. 9999 d. 99,999

7. 65 × 0 × 287 = ___________
a. 0 b. 1331 c. 10 d. 1

HOTS
21 st
Century #Critical Thinking
What will come in place of '?' in the diagram? Skills
5 8

3 16 80 12

34 427 ? 16

27 21

A Pinch of History

The multiplication symbol (x) is actually called the cross of San Andreas. The symbol was
first used in maths in the 16th century and the credit goes to William Oughtred, an English
mathematician, for first using the cross of San Andreas to represent the multiplication of
two numbers.

58 Mathematics 4