What is the sum of the counting numbers 1 - 40

820. there  is a shortcut which can be used when adding consecutive numbers regardless of how big it is. it can also be done manually though

The great thing about this problem is they give you everything you need to solve it easily. so the expression is: 12h+30w12h+30wand so everywhere you have an “h” you place 66. and everywhere you have a “w” you place 33. then the expression will look like this: 12(66)+30(33)12(66)+30(33)from here you multiply and then add. getting the following of: $785,862hope this