简便计算就急1.05× ﹙4.8-0.8﹚÷2.1﹙7/8-1/4﹚×﹙2/3-1/9﹚27×19/26
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/06/28 09:24:16
简便计算就急
1.05× ﹙4.8-0.8﹚÷2.1
﹙7/8-1/4﹚×﹙2/3-1/9﹚
27×19/26
1.05× ﹙4.8-0.8﹚÷2.1
﹙7/8-1/4﹚×﹙2/3-1/9﹚
27×19/26
![简便计算就急1.05× ﹙4.8-0.8﹚÷2.1﹙7/8-1/4﹚×﹙2/3-1/9﹚27×19/26](/uploads/image/z/15582843-27-3.jpg?t=%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%E5%B0%B1%E6%80%A51.05%C3%97+%EF%B9%994.8%EF%BC%8D0.8%EF%B9%9A%C3%B72.1%EF%B9%997%2F8%EF%BC%8D1%2F4%EF%B9%9A%C3%97%EF%B9%992%2F3%EF%BC%8D1%2F9%EF%B9%9A27%C3%9719%2F26)
1.05× ﹙4.8-0.8﹚÷2.1
=1.05× 4÷1.05÷2
= 4÷2
=2
﹙7/8-1/4﹚×﹙2/3-1/9﹚
=﹙7/8-2/8﹚×﹙6/9-1/9﹚
=5/8×5/9
=25/75
27×19/26
=(26+1)×19/26
=26×19/26+1×19/26
=19+19/26
=19又19/26
=1.05× 4÷1.05÷2
= 4÷2
=2
﹙7/8-1/4﹚×﹙2/3-1/9﹚
=﹙7/8-2/8﹚×﹙6/9-1/9﹚
=5/8×5/9
=25/75
27×19/26
=(26+1)×19/26
=26×19/26+1×19/26
=19+19/26
=19又19/26
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