发布网友 发布时间:46分钟前
共6个回答
热心网友 时间:45分钟前
8.1×1.9+0.9×1.9+1.9
=(8.1+0.9+1)x1.9
=10x1.9
=19
0.1+1.9×3.2
=0.1+2x3.2-0.1x3.2
=0.1+6.4-0.32
=6.5-0.32
=6.18
热心网友 时间:50分钟前
8.1×1.9+0.9×1.9+1.9
=1.9(8.1+0.9+1)
=1.9*10
=19
0.1+1.9*3.2
=0.1+(2-0.1)*3.2
=0.1+2*3.2-0.1*3.2
=0.1(1-3.2)+2*3.2
=0.1*(-2.2)+2*3.2
=-0.22+2*3.2
=-0.22+6.4
=6.18
热心网友 时间:47分钟前
(8.1+0.9+1)*1.9
=10*1.9
=19
热心网友 时间:51分钟前
=(8.1+0.9)×1.9
=9×1.9
=17.1
热心网友 时间:46分钟前
=(8.1+0.9+1)x1.9=19
=0.1+(2-0.1)x3.2
=0.1+6.4-0.32
=6.18
热心网友 时间:48分钟前
1.9(8.1+0.9+1)=19
后面那个我真是不知道怎么简便 感觉怎么算都很麻烦
感觉你题目0.1前面抄漏了3.2X
3.2(0.1+1.9)=6.4
热心网友 时间:45分钟前
8.1×1.9+0.9×1.9+1.9
=(8.1+0.9+1)x1.9
=10x1.9
=19
0.1+1.9×3.2
=0.1+2x3.2-0.1x3.2
=0.1+6.4-0.32
=6.5-0.32
=6.18
热心网友 时间:51分钟前
(8.1+0.9+1)*1.9
=10*1.9
=19
热心网友 时间:49分钟前
=(8.1+0.9+1)x1.9=19
=0.1+(2-0.1)x3.2
=0.1+6.4-0.32
=6.18
热心网友 时间:48分钟前
1.9(8.1+0.9+1)=19
后面那个我真是不知道怎么简便 感觉怎么算都很麻烦
感觉你题目0.1前面抄漏了3.2X
3.2(0.1+1.9)=6.4
热心网友 时间:46分钟前
=(8.1+0.9)×1.9
=9×1.9
=17.1
热心网友 时间:50分钟前
8.1×1.9+0.9×1.9+1.9
=1.9(8.1+0.9+1)
=1.9*10
=19
0.1+1.9*3.2
=0.1+(2-0.1)*3.2
=0.1+2*3.2-0.1*3.2
=0.1(1-3.2)+2*3.2
=0.1*(-2.2)+2*3.2
=-0.22+2*3.2
=-0.22+6.4
=6.18