巧算:364-362+360-358+...+60-583333X4444+6X5555X2222 (3+6+9...+102)-(1+4+7+...+100)

来源:学生作业帮助网 编辑:作业帮 时间:2024/12/01 14:31:52
巧算:364-362+360-358+...+60-583333X4444+6X5555X2222 (3+6+9...+102)-(1+4+7+...+100)
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巧算:364-362+360-358+...+60-583333X4444+6X5555X2222 (3+6+9...+102)-(1+4+7+...+100)
巧算:364-362+360-358+...+60-58
3333X4444+6X5555X2222 (3+6+9...+102)-(1+4+7+...+100)

巧算:364-362+360-358+...+60-583333X4444+6X5555X2222 (3+6+9...+102)-(1+4+7+...+100)
364-362+360-358+...+60-58
=2+2+.+2+...+2
=【(364-60)/4 +1】*2
=152
3333X4444+6X5555X2222
=1111*3*1111*4+1111*1111*5*6*2
=1111*1111(3*4+5*6*2)
=1111*1111*72
=8871112
(3+6+9...+102)-(1+4+7+...+100)
=2+2+2+...2++.+2
=[(102-3)/3 +1]*2
=68

364-362+360-358+...+60-58
=2+2+....+2+...+2
=【(364-60)/4 +1】*2
=152