1楼：瀛洲烟雨
〔4.4-(2.5+1.9×0.5)〕÷0.5=【4.4-（2.5+0.95）】÷0.5=【4.4-3.45】÷0.5
=0.95÷0.5
=1.9
不能简算
计算（能用简便方法的用简便方法计算．）12.5×32×2.5 （1-0.2）÷（1-0.84） 9.16×2.5-0.5×9.16
2楼：yoka是好人
（1）12.5×32×2.5
=12.5×8×4×2.5
=（12.5×8）×（4×2.5）
=100×10
=1000；
（2）（1-0.2）÷（1-0.84）
=0.8÷0.16
=5；（3）9.16×2.5-0.5×9.16=9.16×（2.5-0.5）
=9.16×2
=18.32；
（4）6.8×9.9
=6.8×（10-0.1）
=6.8×10-0.68
=68-0.68
=67.32；
（5）0.22×1.5+1.541÷2.3=0.33+0.67
=1；（6）（5.15-3.25）×
0.4+0.36
=1.9×0.4+0.36
=0.76+0.36
=1.12．
2.5*0.6+1.9*0.5用简便方法怎样做
3楼：匿名用户
2.5*0.6+1.9*0.5用简便方法怎样做2.5*0.6+1.9*0.5
=1.5+0.95
=2.45
直接计算
4楼：悉锦禾盼波
2.5*0.6-1.8*0.5
=2.5*0.6-3*0.6*0.5
=（2.5-3*0.5）*0.6
=1*0.6
=0.6
2.5x1.9x0.4的简便计算
5楼：匿名用户
2.5x1.9x0.4的简便计算
=2.5x0.4x1.9
=1x1.9
=1.9
6楼：小芋头帅哥
应该是2.5×0.4×1.9
=1×1.9
=1.9
4.25÷2.5×9.9+1.7 简便运算
7楼：宝宝
4.25÷2.5×9.9+1.7 简便运算
解：原式=1.7+1.7
=3.4
8楼：i顶级型
4.25÷2.5×
9.9+0.17
=(4.25×4)÷(2.5×4)×9.9+0.17=17÷10×9.9+0.17
=1.7×9.9+0.17
=1.7×(10-0.1)+0.17
=17-0.17+0.17=17
9楼：匿名用户
原式=[(4+0.25)÷2.5]×9.9+1.7=(1.6+0.1)×9.9+1.7
=1.7×(10-0.1)+1.7
=17-0.17+1.7
=18.53
10楼：集曦威琅
4.25÷2.5×9.9+1.7
=1.5x9.9+1.7
1.5x(10-0.1)+1.7
=1.5x10-1.5x0.1+1.7
=15+0.15+1.7
=16.85
1.9+2.5+1.1简便计算?
11楼：浅蓝色珍珠儿
你好，1.9+1.1可以先算，因为刚才凑起来是整数3‘接下来就是3+2.5=5.5
因此这个题目的最终答案是5.5’
12楼：小小曹老师
1.9+2.5+1.1
=1.9+1.1+2.5
=3+1.5
=4.5
13楼：蓝色狂想曲
解：1.9+2.5+1.1
原式=1.9+1.1+2.5
=3+2.5
=5.5
14楼：小龙
原式＝1.9+1.1+2.5＝3+2.5＝5.5
3.9÷2.5÷0.5+1.7用简便计算
15楼：匿名用户
3.9÷2.5÷0.5+1.7
=3.9x2÷(10/4)+1.7
=7.8x4/10+1.7
=3.12+1.7
=4.82
1.9x2.5，怎么简便计算？
16楼：妙酒
简便计算
1.9x2.5
=（2-0.1）x2.5
=2x2.5-0.1x2.5
=5-0.25
=4.75
17楼：流星雨中的野鹤
1.9×2.5=（4×0.5-0.1）×2.5=4×2.5×0.5--0.1×2.5=0.5-0.25=0.25
但愿帮到你，望采纳
1.9×2.5的简便运算怎么写？
18楼：乐为人师
1.9×2.5的简便运算
运用乘法分配律使计算简便：
1.9×2.5
=（2-0.1）×2.5
=2×2.5-0.1×2.5
=5-0.25
=4.75
19楼：匿名用户
非常非常非常非常顽固的，非常好。