HOC24
Lớp học
Môn học
Chủ đề / Chương
Bài học
1. Long is a bad swimmer
Long swims badly
2. My brother cycles slowly
My brother is a slow cyclist
Độ dài quãng đường còn lại:
`180-30=150(km)`
Thời gian ô tô đi hết quãng đường còn lại:
`150 : 40 = 3,75(giờ )` = 3 giờ 45 phút
Thời gian ô tô đi hết quãng đường :
3 giờ 45 phút + 35 phút = 4 giờ 20 phút
Đ/s:..
`@An`
Chắc lag
Đây ngta gọi là tay nhanh hơn não
Câu d pé sửa đa thành x = -0,5 nke
=))
`a)`
`13,2-x=-4,3`
`x=13,2-(-4,3)`
`x=17,5`
Vậy `x=17,5`
__________________________
`b)`
\(\dfrac{x}{3}=\dfrac{20}{15}\)
`=>x` `xx15=20xx3`
`x` `xx15=60`
`x=60:15`
`x=4`
Vậy `x=4`
`c)`
\(\dfrac{2}{3}-\dfrac{1}{3x}=\dfrac{-5}{3}+\dfrac{1}{2}\\ \dfrac{2}{3}-\dfrac{1}{3x}=-\dfrac{7}{6}\\ \dfrac{1}{3x}=\dfrac{2}{3}-\left(-\dfrac{7}{6}\right)\\ \dfrac{1}{3x}=\dfrac{11}{6}\\ \Rightarrow1\times6=11\times3\times x\\ 6=33\times x\\ x=5,5\)
Vậy `x=5,5`
`d)`
\(\dfrac{x-3}{5}=\dfrac{-7}{10}\)
`=>(x-3)xx10=5xx(-7)`
`(x-3)xx10=-35`
`x-3=-35:10`
`x-3=-3,5`
`x=-6,5`
Vậy `x=-6,5`
1. You saw that smoke which came from the hills.
2. People's carelessness can cause forest fires which are dangerous.
3. Nam who learns in our class is very intelligent.
4. Minh whom I have known since we were at school is one of my best friends.
5. The new stadium which will be opened next week can hold 120,000 people .
6. My mother who is an excellent cook works as an engineer.
7. Etna is an active volcano which is on the island of sicily.
11. We decorate the house before Tet