Which of the following is equal to 1?
a. 20+ 30+ 40
b. 20× 30× 40
c. (30- 20) × 40
d. (30- 20) × (30+ 20)
Solution:
We know that
a0 = 1
Consider
1. 20+ 30+ 40 = 1 + 1 + 1
= 3
2. 20× 30× 40 = 1 × 1 × 1
= 1
3. (30- 20) × 40= (1 - 1) × 1
= 0 x 1
= 0
4. (30- 20) × (30+ 20) = (1 - 1) × (1 + 1)
= 0 × 2
= 0
Therefore, 20 × 30 × 40 is equal to 1.
✦ Try This: The standard form of the number 35791 is
☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 13
NCERT Exemplar Class 7 Maths Chapter 11 Problem 10
Which of the following is equal to 1: a. 20 + 30 + 40, b. 20 × 30 × 40, c. (30 - 20) × 40, d. (30 - 20) × (30 + 20)
Summary:
20 × 30 × 40 is equal to 1
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