Calculate It!

Decent maths puzzler. No issues so far.
Fairly easy so far, but only up to level 11, of 66 (with more planned?)
Have to click (not press on kb) ESC button after each level. To return to menu, to select the next level.

I would recommend playing the other "Calculate It" game instead - for $2 more you get a substantially more fleshed out and replayable game, with many more calculator-based mechanics. It is truly the trailblazer in the calculate-type game genre.

Obligatory:
"Wow, if I had a nickel for every time I bought a game called 'Calculate It', I'd have two nickels - which isn't a lot, but it's weird that it happened twice."

This game is aimed at education.
You can feel the fun together.