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14 cards from this deck
Decimal places and significant figures
Digit immediately to right of last digit
Round up
Keep last digit unchanged
Replace 9 with 0 and carry 1 to the left
First digit that isn't zero
When they appear after the first non-zero digit
Never add extra zeros after decimal point
Fill zeros up to (but not beyond) decimal point
Round to convenient numbers (1-2 sig figs)
To prove you haven't used a calculator
7.467.467.46
45.7045.7045.70
505050
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