34.5×49×87+34.5×50.13 用简便计算

问题描述:

34.5×49×87+34.5×50.13 用简便计算

34.5×49.87+34.5×50.13
=34.5×(49.87+50.13)
=34.5×100
=3450
(原题可能抄错)