34.5*76.5-345*6.42-123*1.45的简算
问题描述：
34.5*76.5-345*6.42-123*1.45的简算
答
34.5*76.5-345*6.42-123*1.45
=345*7.65-345*6.42-123*1.45
=345*1.23-145*1.23
=200*1.23
=246
满意请采纳~~
答
34.5*76.5-345*6.42-123*1.45
=34.5*76.5-34.5*64.2-123*1.45
=34.5*(76.5-64.2)-123*1.45
=34.5*12.3-12.3*14.5
=(34.5-14.5)*12.3
=20*12.3
=246
答
34.5*76.5-345*6.42-123*1.45
=34.5*76.5-34.5*64.2-123*1.45
=34.5*(76.5-64.2)-12.3*14.5
=34.5*12.3-12.3*14.5
=12.3*(34.5-14.5)
=12.3*20
=246