What is the sum of 44 + 45 + 46 + 47 ... + 142 + 143

Umm You do now there a calculator on here fo you to use?That can help you

n = number of terms = 143 - 44 + 1 = 100

The sum is given by

n ( first term + last term) / 2 =

100 ( 44 + 143)/2 =

50 ( 187) = 9350

We know that 143+44 = 187

We also know that 142+45 = 187

I think you got the idea by now:

We eventually work all the way in giving us 187*50

==== 9350