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3 tháng 7 2016
=2013.7645+(2013+1).2355-1355
=2013.7645+2013.2355+2355-1355
=2013.(7645+2355)+1000
=2013.10000+1000
=20130000+1000
=20131000
giúp mình nhá
NL
Nguyễn Lê Phước Thịnh
CTVHS
31 tháng 5
Bài 1: ABCD là hình chữ nhật
=>AB=CD
=>CD=8cm
ABCD là hình chữ nhật
=>BC=AD
=>BC=6cm
ABCD là hình chữ nhật
=>AC=BD
=>BD=10(cm)
Bài 2;
EFGH là hình thoi
=>EF=FG=GH=EH
=>GH=FG=EH=5cm
bài 8:
ABCD là hình thoi
=>AB=BC=CD=DA
=>BC=CD=DA=20cm
ABCD là hình thoi
=>AC cắt BD tại trung điểm của mỗi đường
=>O là trung điểm chung cua AC và BD
O là trung điểm của AC
=>\(AC=2\cdot AO=2\cdot16=32\left(\operatorname{cm}\right)\)
O là trung điểm của BD
=>\(DB=2\cdot BO=2\cdot12=24\left(\operatorname{cm}\right)\)
9 tháng 12 2021
Bài 5 :
Đánh dấu vào câu b
Bài 6 :
\(468\times135=63180\)
\(579\times254=147066\)
\(936\times205=191880\)
8 tháng 11 2019
\(B=|2014-2x|+|2016-2x|\)
\(=|2014-2x|+|2x-2016|\ge|2014-2x+2x-2016|\)
Hay \(B\ge2\)
Dấu"="xảy ra \(\Leftrightarrow\left(2014-2x\right)\left(2x-2016\right)\ge0\)
\(\Leftrightarrow\hept{\begin{cases}2014-2x\ge0\\2x-2016\ge0\end{cases}}\)hoặc \(\hept{\begin{cases}2014-2x< 0\\2x-2016< 0\end{cases}}\)
\(\Leftrightarrow\hept{\begin{cases}2x\le2014\\2x\ge2016\end{cases}\left(loai\right)}\)hoặc\(\hept{\begin{cases}2x>2014\\2x< 2016\end{cases}}\)
\(\Leftrightarrow\hept{\begin{cases}x>1007\\x< 1008\end{cases}}\)
\(\Leftrightarrow1007< x< 1008\)
Vậy \(B_{min}=2\)\(\Leftrightarrow1007< x< 1008\)
VN
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1
KY
11 tháng 4 2022
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DT
Đỗ Thanh Hải
CTVVIP
26 tháng 11 2021
1 She told us that she would come with us
2 They told me that they had visited Paris many times
3 He said that he didn't like eggs
4 She told me that I had passed my exam
5 He told us that he couldn't hear us
?
Question VI. Combine these sentences using given words Example: He does more exercise. He is putting on weight.(because) => He does more exercise because he is putting on weight 1. He stayed at home. He was sick. (because) =>……………………………………………………………………………………………….. 2. It was very cold. They went swimming. (but) =>……………………………………………………………………………………………….. 3. We can go camping. We can go for a picnic. (or) =>……………………………………………………………………………………………….. 4. He had a stomachache. He didn’t wash his hands. (so) =>………………………………………………………………………………………………… Question VI. Combine these sentences using given words Example: He does more exercise. He is putting on weight.(because) => He does more exercise because he is putting on weight 1. He stayed at home. He was sick. (because) =>……………………………………………………………………………………………….. 2. It was very cold. They went swimming. (but) =>……………………………………………………………………………………………….. 3. We can go camping. We can go for a picnic. (or) =>……………………………………………………………………………………………….. 4. He had a stomachache. He didn’t wash his hands. (so) =>…………………………………………………………………………………………………