1.要粉刷一间长5米,宽4米,5米的房子的顶面与四周墙壁,若门窗面积是18平方米,问要粉刷的面积是多少?2.已知三角形的周长为50,第一条边长为5m+2n,第二条边长的2倍比第一条边长少2m-n+1,求第三条
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1.要粉刷一间长5米,宽4米,5米的房子的顶面与四周墙壁,若门窗面积是18平方米,问要粉刷的面积是多少?2.已知三角形的周长为50,第一条边长为5m+2n,第二条边长的2倍比第一条边长少2m-n+1,求第三条
1.要粉刷一间长5米,宽4米,5米的房子的顶面与四周墙壁,若门窗面积是18平方米,问要粉刷的面积是多少?
2.已知三角形的周长为50,第一条边长为5m+2n,第二条边长的2倍比第一条边长少2m-n+1,求第三条边的长.
3.一个三角形第一条边长为 (2a-b) 厘米,第二条边比第一条边长(a+2b) 厘米,第三条比第一条边的2倍少b 厘米,求这个三角形的周长.
英语:根据对话填写单词补全对话.
A.( )is that on zhe desk?
B.Oh,( )is a photo of my family.
A.Well,let me have a look.Are( )your parents?
B.Yes,And( )ia my sister.She's an English teacher.( )name is Ann.
1.要粉刷一间长5米,宽4米,5米的房子的顶面与四周墙壁,若门窗面积是18平方米,问要粉刷的面积是多少?2.已知三角形的周长为50,第一条边长为5m+2n,第二条边长的2倍比第一条边长少2m-n+1,求第三条
数学:
5*3.5*2+5*4+3.5*4*2-18 (纠正一下2楼的)
=35+20+28-18
=65(平方米)
(2)式子和2楼的一样,但答案有点奇怪
(2a-b)+(2a-b+a+2b)+2(2a-b)-b
=2a-b+3a+b+4a-2b-b
=9a-3b
英语:
A.(What)is that on the desk?
B.Oh,(that)is a photo of my family.
A.Well,let me have a look.Are(they )your parents?
B.Yes,And(this)is my sister.She's an English teacher.(Her)name is Ann.
都是我自己写的~
1. 5*4*3.5-18
2. 50-(55M+2N)-[(5M+2N+2M-N+1)/2 再简化就可以了
4. A. WHAT B.THIS C. / D. SHE
顶一楼
(What)is that on the desk?
Oh,(that)is a photo of my family.
Well,let me have a look. Are(they)your parents?
Yes.And(she)is my sister.She is an English teacher.(Her)name is Ann
我才六年级,所以做出来的不一定对噢!
英语:
(What)is that on the desk?
Oh,(that)is a photo of my family.
Well,let me have a look. Are(they)your parents?
Yes.And(she)is my sister.She is an English teacher.(Her)name is Ann