30/1+42/1+56/1+72/1 (综合算式)简便
来源:学生作业帮助网 编辑:六六作业网 时间:2024/08/28 04:05:30
30/1+42/1+56/1+72/1(综合算式)简便30/1+42/1+56/1+72/1(综合算式)简便30/1+42/1+56/1+72/1(综合算式)简便你是不是分子分母打反了1/30=1/(
30/1+42/1+56/1+72/1 (综合算式)简便
30/1+42/1+56/1+72/1 (综合算式)简便
30/1+42/1+56/1+72/1 (综合算式)简便
你是不是分子分母打反了
1/30=1/(5*6)=1/5-1/6
1/42=1/(6*7)=1/6-1/7
1/56=1/(7*8)=1/7-1/8
1/72=1/(8*9)=1/8-1/9
所以1/30+1/42+1/56+1/72
=1/5-1/6+1/6-1/7+1/7-1/8+1/8-1/9
=1/5-1/9=(9-5)/45=4/45
1/30+1/42+1/56+1/72+1/90
1/30+1/42+1/56+1/72+1/90
1/30+1/42+1/56+1/72 简算
1/30+1/42+1/56+1/72简便算法
1/30+1/42+1/56+1/72=
简算1/30+1/42+1/56+1/72=?
1/30+1/42+1/56+1/72=
30分之1+42分之一+56分之1+72分之一
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72
1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72
1/12+1/20+1/30+1/42+1/56+1/72+1/90
1/12+1/20+1/30+1/42+1/56+1/72+1/90
1/6+1/12+1/20+1/30+1/42+1/56+1/72 简便计算
1/2+1/6+1/20+1/30+1/42+1/56+1/72等于多少?
1/2+1/6+1/20+1/30+1/42+1/56+1/72等于几?
1/6+1/12+1/20+1/30+1/42+1/56+1/72
1/12+1/20+1/30+1/42+1/56+1/72+1/90=?
1/6+1/12+1/20+1/30+1/42+1/56+1/72=?