Question

Find the product of the given expression by suitable rearrangement:
125 × 40 × 8 × 25

• A. 1000000
• B. 10000000
• C. 100000
• D. 10000

Answer 1

The correct option is A 1000000

We can rearrange the terms of the given expression by making use of the law of associativity.
As per law of associativity, a × ( b × c ) = ( a × b ) × c.
In other words, the order of grouping of terms does not affect the final product.

Therefore, we can rearrange the expression as:
125 × 40 × 8 × 25 = (125 × 8) × (40 × 25)
= 1000 × 1000 = 1000000

Thus, option 'a' is the required answer.