1楼:匿名用户
28-(3.4+1.25×2.4)
=28-(3.4+1.25×8×0.3)
=28-(3.4+10×0.3)
=28-6.4
=21.6
2楼:尹大海的爱琦琦
原式=28-3.4-1.25*8*0.3
=24.6-3
=21.6
3楼:匿名用户
28-(3.4+1.25×2.4)
=28-(3.4+1又1/4×2.4)
=28-(3.4+5/4×2.4)
=28-(3.4+5×0.6)
=28-(3.4+3)
=28-6.4
=21.6
28-(3.4+1.25×2.4怎样简便计算?
4楼:匿名用户
28-(3.4+1.25×2.4)
=28-(3.4+1.25×8×0.3)
=28-(3.4+10×0.3)
=28-6.4
=21.6
5楼:黑喀
48×(1/3+
1/4-1/2)
=48×1/3+48×1/4-48×1/2=16+12-24
=4第二题
=3.5×1/4+25%×396.5
=25%×(3.5+396.5)
=0.25×400
=0.25×4×100
=100
28-(3.4+1.25x2.4)能简算吗?怎么算
6楼:皮皮鬼
解28-(3.4+1.25x2.4)
=28-3.4-1.25x2.4
=24.6-1.25×(2+0.4)
=24.6-1.25×2-1.25×0.4=24.6-2.5-0.5
=24.6-(2.5+0.5)
=24.6-3
=21.6
7楼:雨中一朵浪花
可以的。
先算1.25x2.4=(1+0.25) x (2+0.4)=2+0.4+0.5+0.1=3
28-(3.4+1.25x2.4) = 28 - (3.4+3) = 28-6.4 =21.6
28-(3.4+1.25x2.4)二?
8楼:飘渺墨雪
28-(3.4+1.25x2.4)
=28-(3.4+3)
=28-6.4
=21.6
9楼:刘任凭解说
=28-(3.4+3)
=28-6.4
=21.6
28-(3.4+1.25×4)可以一步算成吗?
10楼:梦回大唐杨贵妃
28-(3.4+1.25×4)
=28-(3.4+5)
=28-8.4
=19.6
不可以一步算成,不符合简便算法
18-(3.4+1.25×0.24)能用简便方法怎么做?
11楼:匿名用户
18-(3.4+1.25×0.24)
=18-(3.4+1.25×8x0.03)=18-(3.4+10x0.03)
=18-(3.4+0.3)
=18-3.7
=14.3
12楼:君而有信
这个简单哦
=18-(3.4+1.25×0.4×0.6)=18-(3.4+0.5×0.6)
=18-(3.4+0.3)
=18-3.7
=14.3
13楼:乐为人师
18-(3.4+1.25×0.24)能用简便方法怎么做?
18-(3.4+1.25×0.24)
=18-(3.4+0.3)
=18-3.7
=14.3
14楼:匿名用户
18-(3.4+1.25×0.24)
=18-(3.4+1.25×0.8×0.3)=18-(3.4+1×0.3)
=18-3.7
=14.3
15楼:好丽友
简算:18-(3.4+1.25×0.24)
=18-(3.4+1.25×0.8×0.3)=18-(3.4+1×0.3)
=18-(3.4+0.3)
=18-3.7
=18-(4-0.3)
=18-4+0.3
=14+0.3
=14.3
16楼:尹大海的爱琦琦
原式=18-3.4-1.25*0.8*0.3
=14.6-0.3
=14.3
17楼:一股情流
简便方法,这道题不能用简便方法,应该按顺序计算
18楼:梦醉纤尘
=18-(3.4+1.25x0.4x0.6)=18-(3.4+0.3)
=18-3.7
=14.3
19楼:
简单方法:
18-(3.4+1.25x0.24)
=18-3.4-(1.25x0.24)
=14.6-(1.25x8x0.03)
=14.6-(10x0.03)
=14.6-0.3
=14.3
17.4-(3.75+2.4)怎样简便计算?
20楼:光阴的笔尖
加法交换律
指两个加数相加,交换加数的位置,和不变。即a+b=b+a。
17.4-(3.75+2.4)
=17.4-2.4-3.75
=15-3.75
=11.25
21楼:司马鱼飞
简便计算过程如下
17.4-(3.75+2.4)
=17.4-3.75-2.4
=(17.4-2.4)-3.75
=15-3.75
=11.25望采纳
22楼:妙酒
简便计算
17.4-(3.75+2.4)
=17.4-2.4-3.75
=15-3.75
=11.25
18-(1.4+1.25×2.4)的简便计算
23楼:宝宝
18-(1.4+1.25×2.4)的简便计算解:根据拆分法的运用,
原式=18-1.4-1.25x8x0.3
=16.6-10x0.3
=16.6-3
=13.6
24楼:匿名用户
18-(1.4+1.25×2.4)
=18-(1.4+1.25×8×0.3)
=18-(1.4+10×0.3)
=18-(1.4+3)
=18-3-1.4
=15-1.4
=13.6