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1: =1/8*9/4=9/32
2: =8/27*243/32=9/4
3: =(5/4*4/5)^5*(4/5)^2=16/25
4: \(=\left(-\dfrac{5}{6}\cdot\dfrac{6}{5}\right)^2\cdot\left(\dfrac{6}{5}\right)^2=\dfrac{36}{25}\)
5: \(=\left(-\dfrac{4}{3}\right)^3\cdot\left(\dfrac{3}{4}\right)^{10}=\left(-1\right)\left(\dfrac{3}{4}\right)^7=-\left(\dfrac{3}{4}\right)^7\)
6: \(=\left(\dfrac{1}{3}\cdot\dfrac{-9}{2}\right)^4\left(-\dfrac{9}{2}\right)^2=\left(-\dfrac{3}{2}\right)^4\cdot\dfrac{81}{4}=\dfrac{9}{4}\cdot\dfrac{81}{4}=\dfrac{729}{16}\)
8: =(0,2*5)^4*5^2=25
10: =-0,5^5*2^10
=-0,5^5*2^5*2^5
=-32
13: =(0,5*2)^2*2^2=4
Lời giải chi tiết:
| 3 + 4 > 6 | 6 + 1 > 6 | 5 + 1 = 6 |
| 3 + 4 = 7 | 5 + 2 > 6 | 7 – 5 > 3 |
| 7 – 4 < 4 | 7 – 2 = 5 | 7 – 6 = 1 |
15: A= 1/3-3/4+3/5+1/2007-1/36+1/15-2/9
Sửa đề:
A=-3/4-2/9-1/36+1/3+3/5+1/15+1/2007
=-27/36-8/36-1/36+5/15+9/15+1/15+1/2007
=-1+1+1/2007=1/2007
16:
\(A=\dfrac{1}{3}+\dfrac{3}{5}+\dfrac{1}{15}-\dfrac{3}{4}-\dfrac{2}{9}-\dfrac{1}{36}+\dfrac{1}{64}\)
\(=\dfrac{5+9+1}{15}+\dfrac{-27-8-1}{36}+\dfrac{1}{64}\)
=1/64
17:
=1/2-1/2+2/3-2/3+3/4-3/4+4/5-4/5+5/6-5/6-6/7
=-6/7
4 + 5 = 9 6 + 3 = 9 1 + 8 = 9
4 + 1 + 4 = 9 6 + 1 + 2 = 9 1 + 2 + 6 = 9
4 + 2 + 3 = 9 6 + 3 + 0 = 9 1 + 5 + 3 = 9
4+5 =9 . 6+3=9 1+8=9 4+1+4=9 6+1+2=10 1+2+6=9 4+2+3=9 6+3+0=9 1+5+3=9 Đúng thì cho chứ đừng cho sai nha
bằng 9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999 nha bạn
bằng 1.6 nha nhưng tôi ko biết 5 nhân 6 hay 5 chia 6 tôi chỉ làm 5 nhân 6 thôi