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Find a common denominator (40 is a good choice in this case):

3/10 + 1/5 + 1/8 = 3x4/10x4 + 1x8/5x8 + 1x5/8x5
= 12/40 + 8/40 + 5/40
= 12+8+5/40
= 25/40
= 5x5

/8x5


= 5/8

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11y ago
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Q: What is 3 over 10 plus 1 over 5 plus 1 over 8 in simplest form?
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