25x(I6十32)简便方法?

如题所述

第1个回答  2020-04-13
25X(16+32) [简便方法]
=25x16+25X32
=25X4X4+25X4X8
=100X4+100x8
=400+800
=1200
第2个回答  2020-04-13
25x(16+32)
=25x(4x4十4x8)
=25X4x4十25x4x8
=100x4十100x8
=400+800
=1200