A messenger entered a building on the ground
(0) floor. He delivered a package to someone on
the 15th floor. That person sent him with a
package to the 3rd floor, who then sent him up
to the 38th floor before finally riding the
elevator all the way back down to the ground
floor to exit. In all, how many floors did the
messenger travel?

The messenger traveled a total of 100 floors while delivering packages.

A numerical expression is a mathematical statement written in the form of numbers and unknown variables. We can form numerical expressions from statements.

Given, A messenger entered a building on the ground floor zero.

He delivered a package to someone on the 15th floor which is (0 + 15).

= 15 floors.

That person sent him with a package to the 3rd floor, which is (15 - 3) = 12 floors.

∴ Total floors he traveled (15 + 12) = 27 floors.

who then sent him up to the 38th floor, so from 3rd to 38th he traveled

(38 - 3) = 35 floors.

∴ Total distance he traveled is = (27 + 35) = 62 floors.

Now he is on the 38th floor so, to reach zero level he needs to travel 38 floors.

Total distance traveled by him is = (62 + 38) = 100 floors.

learn more about numerical expressions here :

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