\(=\dfrac{-5}{11}\left(\dfrac{13}{8}+\dfrac{13}{5}\right)+\dfrac{-1}{33}\)
\(=\dfrac{-5}{11}\cdot\dfrac{13\cdot13}{40}+\dfrac{-1}{33}\)
\(=\dfrac{-1}{8}\cdot\dfrac{169}{11}+\dfrac{-1}{33}=\dfrac{-169}{88}-\dfrac{1}{33}=\dfrac{-515}{264}\)
(-5/11 : 13/8 - 5/11 : 13/5) + (-1/33) (-3/2)2+ | -1/8 | - 5/12 3/5 + |-5/3| - (-1/2)+(-1/4) SOS
(-5/11:13/8-5/11:13/5)+-1/33
\((-5/11:13/8-5/11:13/5)+-1/33\)
Tính nhanh: ( -5/11:13/8-5/11:13/5)+(-1/33)
\(\dfrac{11}{8}.\left[\left(-\dfrac{5}{11}:\dfrac{13}{8}-\dfrac{5}{11}:\dfrac{13}{15}\right)+\dfrac{-6}{33}\right]+\dfrac{-3}{4}\)
tính một cách hợp lý
a) (-5/11 : 13/8 - 5/11 : 13/5 ) + -1/33
b) 2*6^9 - 2^5 * 18^4/2^2 * 6^8
c)
A=1/6-3/8+7/10-9/11+5/13-11/19-5/13+9/11-7/10+3/8-1/6
8)Tính nhanh :
a) -3/7+5/13+ -4/7
b)-5/8+3/4+ -1/5+-3/8+1/4
c)6/7.8/13+6/7.9/13+ -3/13.6/7
d)-5/7.2/11+ -5/7.9/11+1 5/7
e)11 3/13 - (2 4/7+5 3/13)
f) (1-1/2)(1-1/3)(1-1/4)(1-1/5)
Tính nhanh:
A=1/6-3/8+7/10-9/11+5/13=11/19-5/13+9/11-7/10+3/8-1/6
