987-(287+135)简便运算
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987-(287+135)简便运算987-(287+135)简便运算987-(287+135)简便运算987-(287+135)=987-287-135=700-135=565987-(287+135
987-(287+135)简便运算
987-(287+135)简便运算
987-(287+135)简便运算
987-(287+135)
=987-287-135
=700-135
=565
987-(287+135)
=987-287-135
=700-135
=565