Correct Answers: 0
Score: 0
Addition Learning Module
Select module:
Digit Probabilities
Enter percentages for digits 0 through 9.
They must total 100%.
For the leading digit of a multi-digit integer,
0 is excluded and the probabilities for 1-9 are
automatically renormalized.
Complements Test:
This test contains 90 A + B questions. The signed leading
digit of B is balanced across all 18 nonzero possibilities
from −9 through −1 and +1 through +9, with each option
appearing exactly five times.
Column Test:
This test contains five fixed tasks designed to bridge
two-number addition and longer multi-integer addition.
You will solve, in order: 60 one-digit numbers,
30 two-digit numbers, 20 three-digit numbers,
15 four-digit numbers, and 12 five-digit numbers.
The numbers are arranged in screen-sized columns so that
no scrolling is required during a task. If "Exclude carried
column(s)" is selected, enter only the last digits of the
answer equal to the digit length of that task.
Operations:
Type the number on the screen to estimate your typing speed for comparative purposes.
Timer: 0 seconds