28(3.4+1.25 2.4)怎样简便计算

2020-11-26 06:09:28 字数 3653 阅读 1877

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