102-100+98-96+94-92.+6-4+2等于几

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102-100+98-96+94-92.+6-4+2等于几

102-100+98-96+94-92.+6-4+2等于几
102-100+98-96+94-92.+6-4+2等于几

102-100+98-96+94-92.+6-4+2等于几
102-100+98-96+94-92.+6-4+2
=(102-100)+(98-96)+(94-92).+(6-4)+2
=2+2+2+.+2+2(共26个)
=52
或者
102-100+98-96+94-92.+6-4+2
=(102+98+94+...+2)-(100+96+92+...+4)
=(102+2)*26/2-(100+4)*25/2
=1352-1300
=52