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I often find myself wishing my mental maths was better in general, I'm pretty dreadful at it and while I'm never more than five seconds or so away from a calcul

I often find myself wishing my mental maths was better in general, I'm pretty dreadful at it and while I'm never more than five seconds or so away from a calculator it's still sometimes a slowdown and context switch I could do without.

waterhouse 5y ago
(20% serious) Play Sid Meier's Alpha Centauri. A useful thing to do there is to rush-buy improvements, but to spend just enough energy credits that it gets finished the next turn. For example, if it would take 52 credits to purchase a Recycling Tanks, and the base produces 3 minerals per turn, then you want to spend 52 - 3 * 2 = 46 energy, and the game would let you do that. One does quite a lot of arithmetic that way...