7ha 14m²

=7,0014 ha

432,8ha 

=4,328 km²

7ha 14m2 = 7,0014ha

432,8ha = 4,328km2

7ha 14m² = 7,0014 ha

432,8 ha = 0,4328 km²

chưa chắc đúng =(((

a)1,5735ha
b)4,28km2
c)0,0892ha
d)0,14km2

A, 15735 m2 = 1,5735 ha

B, 428 ha = 4,28 km2

C, 892 m2 = 0,0892 ha

D, 14 ha = 0,14 km2

A 1,5735ha        B 4,28km2            C 0,0892ha                D 0,14km2                                                                                                         kết bạn với mình nhé

26dam² 8m²

200ha

30000ha ( ha là viết tắt của hm² )

2608 m² = 26 dam² 8 m²

2 km² = 200 ha

30 000 hm² = 3 ha

cảm ơn các bạn nha !

\(12m^26dm^2=12,06m^2\)

\(23ha512m^2=23.0512ha\)

\(5.6km^2=560ha\)

\(21ha=0.21km^2\)

\(7km^2241m^2=7000241m^2=700.0241ha\)

1367,54m² = 13,6754ha

493,7dam² = 4,937ha

678,106hm² = 678,106ha

6,78km² = 678ha

605 ha

\(6,5km^2=650ha\)

20,8+32,91-7,65:1,5

= 20,8+32,91-5,1

= 53,71-5,1

= 48,61

6,5 km2 = 650 ha

20,08 + 32,91 - 7,65 : 1,5

=20,08 + 32,91 - 5,1

=52,99 - 5,1

=47,89

1 Where are the picture which were on this wall

2 My father is the person who has great influence on my behavior

3 Do you like the flowers which I bought this morning?

4 All of us are interested in the man who is teaching us PE

5 What's the name of the girl who lent you this book?

6 I don't know the man who wrote lots of good books

7 The girl who has worked here for 5 days will leave me the message

8 All the man who are businessman attended the meeting

9 Do you know the lady who is presenting the topic

10 I haven't read the novel which was written by Nam cao

\(a,2\left|3x-1\right|+1=5\\ \Rightarrow2\left|3x-1\right|=5-1\\ \Rightarrow2\left|3x-1\right|=4\\ \Rightarrow\left|3x-1\right|=4:2\\ \Rightarrow\left|3x-1\right|=2\\ \Rightarrow\left[{}\begin{matrix}3x-1=2\\3x-1=-2\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}3x=3\\3x=-1\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=1\\x=-\dfrac{1}{3}\end{matrix}\right.\)

\(b,\left|\dfrac{x}{2}-1\right|=3\\ \Rightarrow\left[{}\begin{matrix}\dfrac{x}{2}-1=3\\\dfrac{x}{2}-1=-3\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}\dfrac{x}{2}=4\\\dfrac{x}{2}=-2\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=8\\x=-4\end{matrix}\right.\)

\(c,\left|-x+\dfrac{2}{5}\right|+\dfrac{1}{2}=3,5\\ \Rightarrow\left|-x+\dfrac{2}{5}\right|=3,5-\dfrac{1}{2}\\ \Rightarrow\left|-x+\dfrac{2}{5}\right|=3\\ \Rightarrow\left[{}\begin{matrix}-x+\dfrac{2}{5}=3\\-x+\dfrac{2}{5}=-3\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}-x=\dfrac{13}{5}\\-x=-\dfrac{17}{5}\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=-\dfrac{13}{5}\\x=\dfrac{17}{5}\end{matrix}\right.\)

\(d,\left|x-\dfrac{1}{3}\right|=2\dfrac{3}{5}\\ \Rightarrow\left|x-\dfrac{1}{3}\right|=\dfrac{13}{5}\\ \Rightarrow\left[{}\begin{matrix}x-\dfrac{1}{3}=\dfrac{13}{5}\\x-\dfrac{1}{3}=-\dfrac{13}{5}\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=\dfrac{13}{5}+\dfrac{1}{3}\\x=-\dfrac{13}{5}+\dfrac{1}{3}\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}\dfrac{44}{15}\\x=-\dfrac{34}{15}\end{matrix}\right.\)