问题描述:
用简便方法计算537-(543-163)-57?
解1:537-(543-163)-57
=537-57-(543-163)
=480-380
=100
解2:537-(543-163)-57
=(537+163)-(543+57)
=700-600
=100
哪一种解法好?
解1:537-(543-163)-57
=537-57-(543-163)
=480-380
=100
解2:537-(543-163)-57
=(537+163)-(543+57)
=700-600
=100
哪一种解法好?
问题解答:
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