用简便方法计算 3尀4+3尀28+3尀70+3尀130+3尀208

2025-03-03 04:52:03
推荐回答(5个)
回答1:

=1-1/4+3\28+3\70+3\130+3\208
=1-1/7+3\70+3\130+3\208
=1-1/10+3\130+3\208
=1-1/13+3\208
=1-13/208
=1-1/16
=15/16

回答2:

3/4=1-1/4
3/28=1/4-1/7
3/70=1/7-1/10
3/130=1/10-1/13
3/208=1/13-1/16
和=1-1/16=15/16

回答3:

愿式=(1-1/4)+(1/4-1/7)+(1/7-1/10)+(1/10-1/13)+(1/13-1/16)

=15/16

回答4:

=(1-1/4)+(1/4-1/7)+(1/7-1/10)+(1/10-1/13)+(1/13-1/16)=15/16

回答5:

3\4+3\28+3\70+3\130+3\208
=1-1/4
+1/4-1/7
+1/7-1/10
+1/10-1/13
+1/13-1/16
=1-1/16
=15/16