58/7+5.8-23/7+4.2怎么简算?
问题描述:
58/7+5.8-23/7+4.2怎么简算?
答
58/7+5.8-23/7+4.2
=58/7-23/7+(5.8+4.2)
=5+10
=15
答
=(58-23)/7+(5.8+4.2)
=35+10
=45
答
=(58/7-23/7)+(5.8+4.2)
=35/7+10
=5+10
=15
答
58/7+5.8-23/7+4.2
=(58/7-23/7)+(5.8+4.2)
=5+10
=15