b= 6^30.3^11.7-2^31.5.3^40/2^28.17.3^38-6^27.3^11
Những câu hỏi liên quan
B=6^30.3^11.7-2^31.5.3^40/2^28.17.3^38-6^27.3^11
Rút gọn biêu thức
A=3^2.45^4-15^3.9^3/3^3.45^4-5^4.3^10
B=6^30.3^11.7-2^31.5.3^40/2^28.17.3^38-6^27.3^11
C=35.27^8+70.9^11/15.81^6-60.3^20
D=4^6.6^7-9^3.8^6/12^5.2^8+18^3.32^3
rút gon biểu thức 2^31.5.3^38)/2^28.17.3^38-6^27.3^11
Bạn nên gõ đề bằng công thức toán (biểu tượng $\sum$ góc trái khung soạn thảo) để mọi người hiểu đề của bạn hơn nhé.
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bài 1 tính
5.4^12.9^9-4.3^20.8^9/5.2^2^29.9^16-7.2^29.27^6/5^11.7^12+5^11.7^11/5^12.7^12+9.5^15.7^11
Giúp tớ vs Tính nhanh a) -3/25.4/17.5/-3.17/2 B)-8/15.13/16:13/30 C)3/11.2/9.-8/33+3/11.7/9 D)-11/25.2/3- -1/6+ -2/3.14/15(âm1/6)
a: \(\dfrac{-3}{25}\cdot\dfrac{4}{17}\cdot\dfrac{5}{-3}\cdot\dfrac{17}{2}=\dfrac{4}{17}\cdot\dfrac{17}{2}\cdot\dfrac{3}{25}\cdot\dfrac{5}{3}=2\cdot\dfrac{1}{5}=\dfrac{2}{5}\)
b: \(=-\dfrac{8}{15}\cdot\dfrac{13}{16}\cdot\dfrac{30}{13}=\dfrac{-8}{15}\cdot\dfrac{15}{8}=-1\)
c: \(=\dfrac{3}{11}\left(\dfrac{2}{9}\cdot\dfrac{-8}{33}+\dfrac{7}{9}\right)=\dfrac{3}{11}\cdot\dfrac{215}{297}=\dfrac{2015}{1089}\)
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B=5/6+6 5/6.(11 94/1591-6 38/1517):8 11/40
Find and correct the mistake:1. I go to school at 6:40 oclock.2. My school finish at 11:30.3. What do your sister do?- Shes a pupil.4. My father water the flowers yesterday morning.5. He goes on bed at 9:45.6. My mother gets up early on the morning.7. Mr. Tuan is a doctor. He works in the field.8. Her grandfather plants rice, vegetable and raises pig, chicken. He is a factory worker.9. Mr. Lien teaches English at my school. She is a pupil.10. There is four people in my family: my father, my moth...
Đọc tiếp
Find and correct the mistake:
1. I go to school at 6:40 o'clock.
2. My school finish at 11:30.
3. What do your sister do?- She's a pupil.
4. My father water the flowers yesterday morning.
5. He goes on bed at 9:45.
6. My mother gets up early on the morning.
7. Mr. Tuan is a doctor. He works in the field.
8. Her grandfather plants rice, vegetable and raises pig, chicken. He is a factory worker.
9. Mr. Lien teaches English at my school. She is a pupil.
10. There is four people in my family: my father, my mother, my brother and me.
1. I go to school at 6:40.
2. My school finishes at 11:30.
3. What does your sister do? - She's a pupil.
4. My father watered the flowers yesterday morning.
5. He goes to bed at 9:45.
6. My mother gets up early in the morning.
7. Mr. Tuan is a doctor. He works in the medical field.
8. Her grandfather plants rice, and vegetables, and raises pigs and chickens. He is a farmer.
9. Mr. Lien teaches English at my school. He is a teacher.
10. There are four people in my family: my father, my mother, my brother, and me.
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1 6.40 => 6
2 finish => finishes
3 what do => what does
4 water => waters
5 on => to
6 on => in
7 field => hospital
8 factory worker => farmer
9 pupil => teacher
10 is => are
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a)2^10.3^10:2^10.3^9/2^9.3^10.
b)5^11.7^12+5^11.7^11/5^12.7^12+9.5^11.7^11
Tìm x biết :
4/x=8/6
3/x-5=-4/x+2
X/-2=-8/x
Rút gọn các phân số
2^4.5^2.11^2.7/2^3.5^3.7^2.11
2^10.3^10-2^10.3^9/2^9.3^10
5^11.7^12+5^12.7^11/5^12.7^12+9.5^11.7^11
1. Tìm x, biết:
a) \(\frac{4}{x}=\frac{8}{6}\). Ta có: \(\frac{8}{6}=\frac{8:2}{6:2}=\frac{4}{3}\Rightarrow x=3\)
b) \(\frac{3}{x-5}=\frac{4}{x+2}\). Ta có: \(5-2=3\)
\(\Rightarrow x=\left(3.5\right)+\left(4.2\right)+3=15+8+3=26\)
c) \(\frac{x}{-2}=\frac{-8}{x}\Rightarrow x=\left(-8\right):\left(-2\right)=4\)
2. Rút gọn
a) \(\frac{2^4.5^2.11^2.7}{2^3.5^3.7^2.11}\Leftrightarrow\frac{2^3.2^1.5^2.11.11.7}{2^3.5^2.5^1.7.7.11}\Leftrightarrow\frac{2^1.11}{5^1.7}=\frac{22}{35}\)
b) Tương tự
c) Tương tự
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\(\frac{4}{x}=\frac{8}{6}\Rightarrow x=\frac{4.6}{8}=3\)
\(\frac{3}{x-5}=\frac{-4}{x+2}\Rightarrow3\left(x+2\right)=-4\left(x-5\right)\)
\(\Rightarrow3x+6=-4x+20\)
\(\Rightarrow3x+4x=20-6\)
\(\Rightarrow7x=14\)
\(\Rightarrow x=2\)
\(\frac{x}{-2}=\frac{-8}{x}\Rightarrow x^2=\left(-8\right)\left(-2\right)=16\Rightarrow x=\pm4\)
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\(\frac{4}{x}=\frac{8}{6}\)
\(\Rightarrow4\cdot6=x\cdot8\)
\(\Rightarrow x=\frac{4\cdot6}{8}\)
\(\Rightarrow x=3\)
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