What is the difference between the sums of the 20 largest and 20 smallest two-digit numbers?

The difference between the sums of the 20 largest and 20 smallest two-digit numbers is 1400

Step-by-step explanation:

20 largest two digit numbers are:

(80+81+82+83+84,...,+99)

20 smallest two digit numbers are:

(10+11+12+13+14,...,+29)

Now we have to find the difference between the sums of the 20 largest and 20 smallest two-digit numbers

= (80+81+82+83+84,...,+99) - (10+11+12+13+14,...,+29)

= 1790 - 390

= 1400

Thus the difference between the sums of the 20 largest and 20 smallest two-digit numbers is 1400

i pretty sure it is