1.2+2.3+3.4+4.5+5.612+23+34+45+56.

问题描述:

1.2+2.3+3.4+4.5+5.6
12+23+34+45+56

1.2+2.3+3.4+4.5+5.6
12+23+34+45+56

=
1.2+2.3+3.4+4.5+5.6
(1.2+2.3+3.4+4.5+5.6)×10

=
1
10