Loxivia · Printable cheat sheet
M0 - Discovery
Oct 16, 2026
Numbers
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Place value
digit x 10^n
Each digit is worth ten times more as you move one place to the left.
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The number line
Numbers are ordered on a line: moving right adds, moving left subtracts.
Arithmetic
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Addition
Addition combines amounts. Line up digits by place value and carry when a column passes 9.
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Subtraction
Subtraction finds the difference. Borrow from the next column when needed.