用简便方法算697+136-97
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用简便方法算697+136-97
用简便方法算697+136-97
用简便方法算697+136-97
这类题目:简便方法就是取整:697=700-3 ,97=100-3
697+136-97
=700-3+136-(100-3)
=700-100-3+3+136
=736