Overview: 2 questions will be solved this time.Among them
           ☆1 inequalities
           ☆1 convert the decimals to fractions

[ 1/2Inequality]
    Assignment:Find the solution set of inequality （100+x）/240-x/280 > 0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 100 + x ) / 240 - x / 280 > 0         (1)

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    From inequality(1)：
         x ＞ -700

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    The final solution set is :
         x ＞ -700
[ 2/2 Digital analysis ]
    Work: Convert decimal 0.6 to fractional form.
    Question type: Convert decimal to fraction
    Solution:

0.6=

3 5

    *Note: Convert finite decimal to fraction.

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