5/18*3/7*3/5 3/4*2/3+1/6 8/9*3/4+5/6 7/8-4/7*7/16 2.3/7与5/21的和的14倍是多少?3.3/7与21/5的14倍的
展开全部
5/18*3/7*3/5
=(5×3×3)/(18×7×5)
=1/14
3/4*2/3+1/6
=1/2+1/6
=3/6+1/6
=4/6
=2/3
8/9*3/4+5/6
=2/3+5/6
=4/6+5/6
=9/6
=3/2
7/8-4/7*7/16
=7/8-1/4
=7/8-2/8
=5/8
3/7与5/21的和的14倍是多少
(3/7+5/21)×14
=3/7×14+5/21×14
=6+10/3
=28/3
3/7与21/5的14倍的
(3/7+5/21)×14
=3/7×14+5/21×14
=6+10/3
=28/3
=(5×3×3)/(18×7×5)
=1/14
3/4*2/3+1/6
=1/2+1/6
=3/6+1/6
=4/6
=2/3
8/9*3/4+5/6
=2/3+5/6
=4/6+5/6
=9/6
=3/2
7/8-4/7*7/16
=7/8-1/4
=7/8-2/8
=5/8
3/7与5/21的和的14倍是多少
(3/7+5/21)×14
=3/7×14+5/21×14
=6+10/3
=28/3
3/7与21/5的14倍的
(3/7+5/21)×14
=3/7×14+5/21×14
=6+10/3
=28/3
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询