8.7+98.7+998.7+9998.7+99998.7=()
3个回答

8.7+98.7+998.7+9998.7+99998.7

=10-1.3+100-1.3+1000-1.3+10000-1.3+100000-1.3

=111110-1.3×5

=111110-6.5

=111103.5