计算:1.2+2.3+3.4+4.5+5.6+6.712+23+34+45+56+67.
问题描述:
计算:
.1.2+2.3+3.4+4.5+5.6+6.7 12+23+34+45+56+67
答
1.2+2.3+3.4+4.5+5.6+6.7 12+23+34+45+56+67
=
1.2+2.3+3.4+4.5+5.6+6.7 (1.2+2.3+3.4+4.5+5.6+6.7)×10
=
.1 10