早教吧作业答案频道 -->其他-->
脱式计算(能简便的就用简便方法计算).2.7+7.3×1.52.5×0.32×12.517.68÷5.2+2.7×1.53.66×0.8+0.34×0.8-0.835.6-5×1.739.6×28.5+0.285×40.
题目详情
脱式计算(能简便的就用简便方法计算).
2.7+7.3×1.5 | 2.5×0.32×12.5 | 17.68÷5.2+2.7×1.5 |
3.66×0.8+0.34×0.8-0.8 | 35.6-5×1.73 | 9.6×28.5+0.285×40. |
▼优质解答
答案和解析
(1)2.7+7.3×1.5
=2.7+10.95
=13.65
(2)2.5×0.32×12.5
=(2.5×4)×(0.8×12.5)
=10×10
=100
(3)17.68÷5.2+2.7×1.5
=3.4+4.05
=7.45
(4)3.66×0.8+0.34×0.8-0.8
=(3.66+0.34-1)×0.8
=3×0.8
=2.4
(5)35.6-5×1.73
=35.6-8.65
=26.95
(6)9.6×28.5+0.285×40
=9.6×28.5+28.5×0.4
=(9.6+0.4)×28.5
=10×28.5
=285
=2.7+10.95
=13.65
(2)2.5×0.32×12.5
=(2.5×4)×(0.8×12.5)
=10×10
=100
(3)17.68÷5.2+2.7×1.5
=3.4+4.05
=7.45
(4)3.66×0.8+0.34×0.8-0.8
=(3.66+0.34-1)×0.8
=3×0.8
=2.4
(5)35.6-5×1.73
=35.6-8.65
=26.95
(6)9.6×28.5+0.285×40
=9.6×28.5+28.5×0.4
=(9.6+0.4)×28.5
=10×28.5
=285
看了 脱式计算(能简便的就用简便方...的网友还看了以下:
计算:(1)93−712+548(2)(5+6)(52−23)(3)2(8−50+18)(4)32 2020-04-07 …
帮我解决一些口算吧,35+26.53-35.12*8.84/3.2.1+0.7.3.1+0.4.6 2020-04-07 …
我都被搞懵了,我已经拿出了我的全部积蓄(-2.2)+3.8(+41)+(-75)15+(-22)1 2020-04-23 …
写出一个通项公式,使他的前四项分别是下列个数:(1)1+1/2^2,1-3/4^2,1+5/6^2 2020-05-23 …
十进制小数0.9转二进制0.9*2=1.81.8*2=1.60.6*2=1.20.2*2=0.40 2020-06-27 …
由数列的前四项:3/2,1,5/8,3/8……,归纳出通向公式an= 2020-07-14 …
1.在1,2,3,6中互素的有几对?2.1和8,3和23,8和9,13和65,不互素的是哪一对?3 2020-07-16 …
5/8÷(1/2+1/4)8/13÷7+1/7×6/131/2-1/8÷5/12 2020-07-18 …
2010年高考福建卷文科观察下列等式:①cos2a=2-1;②cos4a=8-8+1;③cos6a 2020-07-19 …
3又四分之一减2又5分之3加5又四分之三减8又5分之二.5-6+3+9+-4+7.-0.8+1.2 2020-07-20 …