(8/1+24/1+48/1+80/1+120//1+168/1)*42
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/11/08 06:48:05
(8/1+24/1+48/1+80/1+120//1+168/1)*42
(8/1+24/1+48/1+80/1+120/1+168/1)*42
=(8+24+48+80+120+168)*42
=448*42
=18816
(我觉得你的题目是不是错了,下面那个你作参考吧)
42*(1/8+1/24+1/48+1/80+1/120+1/168)
=42*1/8*(1+1/3+1/6+1/10+1/15+1/21)
=42*1/8*(1+1/3+1/6+1/6+1/21)
=1/8*(42+14+7+7+2)
=1/8*72
=9
=(8+24+48+80+120+168)*42
=448*42
=18816
(我觉得你的题目是不是错了,下面那个你作参考吧)
42*(1/8+1/24+1/48+1/80+1/120+1/168)
=42*1/8*(1+1/3+1/6+1/10+1/15+1/21)
=42*1/8*(1+1/3+1/6+1/6+1/21)
=1/8*(42+14+7+7+2)
=1/8*72
=9
(8/1+24/1+48/1+80/1+120//1+168/1)*42
42x(8/1+24/1+48/1+80/1+120/1+168/1)=?
42*(8分之1+24分之1+48分之1+80分之1+120分之1+168分之1)
42*(1/8+1/24+1/48+1/86+1/120+1/168) 简便方法
(8/1+24/1+48/1+80/1+120//1+168/1)*56
(1/8+1/24+1/48+1/80+1/120+1/168)*56
(1/8+1/24+1/48+1/80+1/120+1/168)乘以56
(1/8+1/24+1/48+1/80+1/120+1/168+1/224)*64=?
(1/8+1/24+1/48+1/80+1/120+1/168+1/224)*64=
(1/8+1/24+1/48+1/80+1/120+1/168+1/224)乘64
(8/1+24/1+48/1+80/1+120/1+168/1+224/1+288/1)*128
(1/8+1/24+1/48+1/80+1/120+1/168+1/224+1/228)*128