198+197-196-195+194+193-192-191+190+197.......-4-

198+197-196-195+194+193-192-191+190+197.......-4-3+2+1
2024-12-29 15:41:08
推荐回答(1个)
回答1:

(198+197-196-195)+(194+193-192-191)....(6+5-4-3)+2+1=4+4+4...+4+2+1 有49个4 所以原式=49*4+2+1=199.