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Earn +20 ptsQ: What is 2 plus 2-1 plus 1?
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20 plus 4-21 plus 2 equals what?
26 - 21 = 5 or 24 - 23 = 1
What is 10 plus 9 plus 1 minus 1 plus 2 minus 2 plus 3 minus 1 plus 4 minus 4?
(10+9)+(1−1)+(2−2)+(3−1)+(4−4) = 21This is the same equation rewritten: (10+9)+(3−1) = 21This can be done as 1-1, 2-2, 4-4 cancel themselves out.
What is 1 over 3 plus 2 over 7?
1/3 + 2/7 = 7/21 + 6/21 = 13/21
What is 1 plus 2 plus 3 plus 4 plus 5 plus 6 equals?
21, sigh.
Two thirds plus one seventh plus four sixths equals?
2/3 + 1/7 + 4/6 = 14/21 + 3/21 + 14/21 = 31/21 = 1 10/21
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