灵鹊做题网24.1×10.1简便计算
来源：学生作业帮 编辑：灵鹊做题网作业帮 分类：数学作业 时间：2024/06/22 21:29:20
24.1×10.1简便计算
24.1×10.1
=
=
24.1×10.1
=
=
24.1×10.1
=24.1×(10+0.1)
=241+2.41
=243.41
再问： 0.02×19.5+19.5+19.5×0.98（简便计算）？
再答： 0.02×19.5+19.5+19.5×0.98 =0.02×19.5+19.5+19.5×(1-0.02) =0.02×19.5+19.5+19.5-19.5×0.02 =39 或0.02×19.5+19.5+19.5×0.98 =（0.02+1+0.98）×19.5 =2×19.5 =39
=24.1×(10+0.1)
=241+2.41
=243.41
再问： 0.02×19.5+19.5+19.5×0.98（简便计算）？
再答： 0.02×19.5+19.5+19.5×0.98 =0.02×19.5+19.5+19.5×(1-0.02) =0.02×19.5+19.5+19.5-19.5×0.02 =39 或0.02×19.5+19.5+19.5×0.98 =（0.02+1+0.98）×19.5 =2×19.5 =39