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15 tháng 12 2021
a. Chu vi là \(\left(12+5\right).2=34\left(m\right)\)
Diện tích là \(12.5=60\left(m^2\right)=600000\left(cm^2\right)\)
b. Cần lát \(600000:\left(40.40\right)=375\) viên gạch
17 tháng 3 2022
TL:
Sai nhé bạn
Bạn k cho mik cái đi nhé
@@@@@@@@@@@@@@@@@
HT
IO
13 tháng 12 2021
3x . 2 + 15 = 33
3x . 2 = 33 - 15 = 18
3x = 18 : 2 = 9 = 32
=> x = 2
NT
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:
1. He hasn't gone abroad before
2. she has driven for 1 month
3. we have eaten since it started to rain
4. i haven't had my hair cut since i left her
5. she hasn't kissed me for 5 months
1. He hasn't gone abroad before
2. She has driven for 1 month
3. I have eaten since it started to rain
4. I haven't had my hair cut since I left her
5. She hasn't kissed me for 5 months
6. We haven't met for a long time
7. How long have you had it?
8. I haven't had such a delicious meal before
9. The last time I saw him was 8 days ago
10. It is Monday since I last took a bath