1.(78.6-0.786×25+75%×21.4)÷15×1997=?简便计算?
1个回答
展开全部
1、(78.6-0.786×25+75%×21.4)÷15×1997
=(78.6-78.6×0.25+0.75×21.4)/15×1997
=【78.6×(1-0.25)+0.75×21.4】/15×1997
=【78.6×0.75+0.75×21.4】/15×1997
=【唯橡0.75×(78.6+21.4】/15×1997
=【0.75×100】/15×1997
=75/15×1997
=5×(2000-3)
=10000-15
=9985
2、336、252、210的最大公因数是42
336/42=8(枝)
252/42=6(枝)
210/42=5(枝)
答:用这些花最多可以扎成42束同样的花束.
在每束花中,红花有8枝,黄花有6枝,粉花有5枝.,11,1、原式=(78.6-78.6×25%+75%×21.4)÷15×1997
=【78.6×(1-25%)+75%×21.4】÷15×1997
=(78.6×75%+75%×21.4)÷15×1997
=75%×(78.6+21.4)÷15×1997
=75÷15×1997
=19970÷2=9985
2、336=2×3×7×8,252=2×3×7×6...,1,1.(78.6-0.786×25+75%×21.4)÷15×1997=?简便计算
2.六年级同学买来336枝红花,252枝黄花,210枝粉花.用这些花最多可以扎成多少束同样的花束?在指凳旁每束花中,红黄粉三种花各有几枝?
3.- (打粗辩一成语)
=(78.6-78.6×0.25+0.75×21.4)/15×1997
=【78.6×(1-0.25)+0.75×21.4】/15×1997
=【78.6×0.75+0.75×21.4】/15×1997
=【唯橡0.75×(78.6+21.4】/15×1997
=【0.75×100】/15×1997
=75/15×1997
=5×(2000-3)
=10000-15
=9985
2、336、252、210的最大公因数是42
336/42=8(枝)
252/42=6(枝)
210/42=5(枝)
答:用这些花最多可以扎成42束同样的花束.
在每束花中,红花有8枝,黄花有6枝,粉花有5枝.,11,1、原式=(78.6-78.6×25%+75%×21.4)÷15×1997
=【78.6×(1-25%)+75%×21.4】÷15×1997
=(78.6×75%+75%×21.4)÷15×1997
=75%×(78.6+21.4)÷15×1997
=75÷15×1997
=19970÷2=9985
2、336=2×3×7×8,252=2×3×7×6...,1,1.(78.6-0.786×25+75%×21.4)÷15×1997=?简便计算
2.六年级同学买来336枝红花,252枝黄花,210枝粉花.用这些花最多可以扎成多少束同样的花束?在指凳旁每束花中,红黄粉三种花各有几枝?
3.- (打粗辩一成语)
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
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