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  3. [img]2011q4/ct_egreqj_egreqjs_0037_20113[/img] One way to solve this problem is

[img]2011q4/ct_egreqj_egreqjs_0037_20113[/img] One way to solve this problem is

游客2025-02-24  20
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答案  One way to solve this problem is to look for the Lowest Common Denominator (LCD). The smallest number that both 4 and 8 divide evenly into is 8, so the fraction 3/8 does not need to be changed. The fraction 1/4 is equivalent to 2/8;2/8 plus 3/8 equals 5/8 , so insert the+ symbol in the blank.
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