Question

3/4-1/4= 1/2+3/8= 6 1/2-2 1/2= 3 1/2-1 1/8=

Answer 1

1) Answer:  ½.
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Explanation:
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 3/4 − 1/4 = 2/4 = 1/2 ; or, ½ .
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2) Answer: ⅝ .
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Explanation:
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 1/2 + 1/8 = (1*4)/(2*4) + 1/8 = 4/8 + 1/8 = 5/8 ; or, ⅝ .
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3) Answer: 4 .
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Explanation:
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6 ½ − 2 ½ = 4 .  (or; 6.5 − 2.5 = 4.0 = 4 .).
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4) Answer: 2 ⅜ .
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Explanation:
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3 1/2 − 1 1/8  = ?
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          → 1/2 = (1*4)/(2*4) = 4/8; → So rewrite: "3 1/2" as: "3 4/8"; and rewrite the problem:
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          →  3 4/8 − 1 1/8  = 2 3/8 ; or, 2 ⅜ .
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Answer 2

1) 1/2
2) 7/8
3) 4
4) 19/8 = 2 3/8