题目内容
（5
-3
）÷2.5+2
．
解：（5-3）÷2.5+2
=（5-3-+）
+
，
=（1
+）×
+，
=
×+，
=
+，
=
．
分析：本题根据四则混合运算的运算顺序计算即可：先算乘除，再算加减，有括号的要先算括号里面的．括号内的带分数可先将整除部分相减后再计算．
点评：完成此类含有分数值较大且不能运用简便方法计算的题目要细心，注意通分、约分．
-3）÷2.5+2=（5-3-
+）+，=（1
+）×+，=
×+，=
+，=
．分析：本题根据四则混合运算的运算顺序计算即可：先算乘除，再算加减，有括号的要先算括号里面的．括号内的带分数可先将整除部分相减后再计算．
点评：完成此类含有分数值较大且不能运用简便方法计算的题目要细心，注意通分、约分．
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