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Mental Addition is pure addition against the clock — no multiplication, no division, just sums. Restricting the operation makes it a much better drill than a mixed one if addition is specifically what you want to get faster at, because every problem exercises the same retrieval.
Press Start to begin the timed run.
Add the numbers shown and type the total.
Correct answers load the next problem immediately.
Problems grow in size as the run goes on.
Your score is correct sums within the time.
Addition fluency and carrying. Carrying is where most adult addition errors come from, and practising it under time pressure is the fastest way to make it automatic. Another math game to try next: Countdown Math.
Add the tens first, then the units. 47+38 becomes 70 then +15, which is easier than a right-to-left column sum.
Round and correct: 47+38 is 47+40−2.
Look for pairs summing to ten within a longer problem and take them first.
Say the running total under your breath. It stops you losing the carry.
Because you are doing it mentally, not on paper. Left to right gives you a usable approximation early and avoids holding carries.
Yes, the numbers grow through the run.
If addition is your slow operation, yes — a mixed drill only gives you a fraction of the reps.
Speed Math and Arithmetic 60s both mix subtraction in. This one is addition only by design.