脱式计算，能简便运算的要简便运算．
5.86+13.08﹣9.27 25.4﹣（15.4﹣6.4） 21+187÷17×11 115×6﹣6×5
（118﹣75）×（475÷25） 23×201﹣23 99×98 395×99+2×395﹣395．
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脱式计算，能简便运算的要简便运算．
5.86+13.08﹣9.27 25.4﹣（15.4﹣6.4） 21+187÷17×11 115×6﹣6×5
（118﹣75）×（475÷25） 23×201﹣23 99×98 395×99+2×395﹣395．
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