How do i compare numerical expressions without calculating them

To do that you need to notice the difference between the given expressions. Take the following case as an example: 10*40 and 20*40. The second expression is double than the first one because 20 is double than 10.

Another example:

20*2 and 10*2 + 10*2

These expressions are equal because 20 can be expressed as 10 + 10; then, distributing the multiplication gives the second expression.

answer: sorry but i need points

step-by-step explanation: