1Â¥:ÄäÃûÓû§
22+23+24+25+26+27+28+29+30=(22+30)/2*9=26*9=234
2Â¥:ÄäÃûÓû§
22+23+24+25+26+27+28+29+30=26 x 9
À©Õ¹ÑµÁ·Ìâ¡£22+23+24+25+26+27+28+29+30Õ¦ÑùÀý³Ë·¨Ëãʽ
3Â¥:ÄäÃûÓû§
=26x9
=234
22+23+24+25+26+27+28+29+30Ôõô¼ÆËã
4Â¥:ÄäÃûÓû§
22+23+24+25+26+27+28+29+30=(22+30)x9¡Â2
=52x9¡Â2
=26x9
=234
5Â¥:À¶½
¿ÉÒÔ(27+23)+(26+24)+(22+28)+(30+29)=(50+50)+(50+59)
=100+109
=209
24+25+26+27+28+29+30+31=()x()ÕâÌâÔõôд
6Â¥:ÓñèƵ·Ò©
24+25+26+27+28+29+30+31=(24+31)x(8/2)
24+25+26+27+28+29+30+31=(27.5)x(8)
7Â¥:ÄäÃûÓû§
=(24+31)+(25+30)+(26+29)+(27+28)= 55*4
22+23+24+25+26+27+28+29+30
8Â¥:ÄäÃûÓû§
Õâ¸öÌâ¿ÉÒÔÈ¡Ò»¸öÖмäÊý,ÐÄËã¾ÍºÃ,ÖмäÊýÊÇ2622µÈÓÚ26¼õ4,30µÈÓÚ22¼Ó4¡¢22¼Ó30µÈÓÚ26³ËÒÔ223µÈÓÚ26¼õ3,29µÈÓÚ26¼Ó3 23¼Ó29µÈÓÚ26³ËÒÔ2............
ËùÒԾ͵ÈÓÚ26³ËÒÔ9
µÈÓÚ234
9Â¥:ƽÑô»¢
22+23+24+25+26+27+28+29+30
=26¡Á9
=234
23+24+25+26+27+28+29+30ÔõôÇÉËã
10Â¥:yiyuanyiÒëÔª
23+24+25+26+27+28+29+30=(23+30)¡Á4
=53¡Á4
=212
20+21+22+23+24+25+26+27+28+29+30+31+......50=
11Â¥:ÄäÃûÓû§
Ôʽ=(20+50)*31/2
=1085
12Â¥:¹ùµçϲ
ÔÌâ=(20+50)¡Á(50-19)¡Â2
=70 ¡Á31 ¡Â2
=1085
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