34 .4 - 66 trên 35.5+10. 34
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a) 4.(13 - 16) - (3-5) .(-3)2
b) -2/5+ 7/11+ -11/10 + 7/-11
c) 1/2+2/3+1/6+-2/5
d) 34 .4-66/ 35.5+10.34
a) Ta có: \(4\cdot\left(13-16\right)-\left(3-5\right)\cdot\left(-3\right)^2\)
\(=4\cdot13-4\cdot16+2\cdot9\)
\(=52-64+18\)
=6
b) Ta có: \(-\dfrac{2}{5}+\dfrac{7}{11}+\dfrac{-11}{10}+\dfrac{7}{-11}\)
\(=-\left(\dfrac{2}{5}+\dfrac{11}{10}\right)+\left(\dfrac{7}{11}-\dfrac{7}{11}\right)\)
\(=-\left(\dfrac{4}{10}+\dfrac{11}{10}\right)\)
\(=\dfrac{-15}{10}=\dfrac{-3}{2}\)
34.66 - 34.4 - 66.34 - 66.4
= ( 34.66 - 66.34) - ( 34.4 +66.4)
= 0 - 4.(34+66)
= -4.100
= -400
\(34.\left(66-4\right)-66.\left(34+4\right)\\ =34.66-34.4-66.34-66.4\\ =\left(34-34-4\right).66-34.4\\ =-4.66-34.4\\ =4.\left(-66\right)-34.4\\ =4.\left(-66-34\right)\\ =4.\left(-100\right)\\=-400\\ -264.\left(-400\right).264.40\\ =264.400.264.40\\ =264.4.100.264.4.10\\ =264.4.264.4.\left(100.10\right)\\ =\left(264.4\right)^2.1000\\ =1115136.1000=1115136000\)
34 . ( 66 - 5 ) - 66 . ( 34 + 5 )
= 34 . 61 - 66 . 39
= 2074 - 2574
= - 500
Ta có 34.(66 - 5) - 66.(34 + 5)
= 34.66 - 34.5 - 66.34 - 66.5
= -5.(34 + 66)
= - 5.100 = - 500
34(66-5)-66(34+5)=34.66-34.5-34.66-66.5=(34.66-34.66)-5(34+66)=-500
\(\dfrac{3^4.4-6^6}{\text{3^5.5+10. 3^4}}\)
=\(\dfrac{3^4.2^2-\left(3.2\right)^6}{3^5.5+2.5.3^4}\)
=\(\dfrac{3^4.2^2-3^6.2^6}{3^4.5.\left(3+2\right)}\)
=\(\dfrac{3^4.2^2.\left(1-3^2.2^2\right)}{3^4.5^2}\)
=\(\dfrac{3^4.2^2.\left(-35\right)}{3^4.5^2}\)
=\(\dfrac{2^2.\left(-7\right).5}{5^2}\)
=\(\dfrac{2^2.\left(-7\right)}{5}\)=\(\dfrac{-28}{5}\)