Additions
Additions only, no negative number: Calculis's gentlest mode, to start out, for kids, or to warm up. At the first level, four numbers from 1 to 9; with each level passed, the series gets longer and the numbers bigger.
How to play
Additions only: add up the numbers as they show, all positive. If you get it right, the next level has more of them, and bigger.
Example
3 + 8 + 5 + 7 = 23
Tips
- Keep a single total in mind and add each number to it as soon as it shows.
- Go through the ten: 18 + 7 is 18 + 2 + 5 = 25.
- The total only goes up: if it drops in your head, you missed a number.
Solo or against someone
Solo, go as far as you can: the first mistake ends the game. Against someone, you play the same levels as your opponent: if you're the only one with the right answer, you win. All the rules