Question

计算99.5+99.6+99.7+82.1+82.2+82.3

Answer 1

99.5+99.6+99.7+82.1+82.2+82.3

=(99.6-0.1)+99.6+(99.6+0.1)+(82.1-0.1)+82.2+(82.2+0.1)

=99.6×3+82.2×3

=3×(99.6+82.2)

=3×181.8

=545.4