A sports store made a display by stacking baseball bats in a pile. The bottom row of the pile has 20 bats, and the top row has 14 bats. Each row has 1 fewer bat than the row below. How many bats are used in the display?

112

119

133

161

There will be 119 bats in total used.

Given the information above, we know the bottom row has 20. We can then count down in the number of rows by 1 until we get to 14 bats.

Bottom - 20 bats

Second row - 19 bats

Third row - 18 bats

Fourth row - 17 bats

Fifth row - 16 bats

Sixth row - 15 bats

Top row - 14 bats

Now we can add each of them to get our total number.

20 + 19 + 18 + 17 + 16 + 15 + 14 = 119 bats