Question

Докажите что 20×30<23×35<30×40

Answer 1

20×30=600
23×35=805
30×40=1200
600<805<1200

Answer 2

20*30=600
23*35=805
30*40=1200
600<805<1200

Answer 3

Proof that 20×30 < 23×35 < 30×40

To prove that 20×30 < 23×35 < 30×40, we can evaluate each expression separately and compare the results.

Let's start by evaluating 20×30: 20×30 = 600

Next, let's evaluate 23×35: 23×35 = 805

Finally, let's evaluate 30×40: 30×40 = 1200

Comparing the results, we can see that 20×30 = 600 is less than 23×35 = 805, and 23×35 = 805 is less than 30×40 = 1200.

Therefore, we have proven that 20×30 < 23×35 < 30×40.

Please note that this proof is based on the numerical values of the expressions and does not require any external sources for verification.