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Earn +20 ptsQ: When does 29 minus 1 equal 30?
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What is 30 minus 1?
30 - 1 = 29
If 30 times 30 equals 900 why does 29 times 31 equal 899?
(x-1)*(x+1) = x2 - x + x - 1 = x2 - 1 So, when x = 30, 29*31 = 30*30 - 1 Or, since 30*30 = 900, 29*31 = 900-1 = 899
What does three tenths minus one sixth equal to?
(3/10) - (1/6) = (9/30) - (5/30) = (4/30) = 2/15
When does 1 plus 1 equal 3 and 2 minus 1 equal 2?
When you are using non-standard definitions of "plus" and "minus", or of "equal".
2 thirds plus 1 whole and 3 fifths minus 3 tenths?
2/3 + 1 + 3/5 - 3/10 = 59/30 or 1 and 29/30
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