34.66 - 34.4 - 66.34 - 66.4

= ( 34.66 - 66.34) - ( 34.4 +66.4)

= 0 - 4.(34+66)

= -4.100 

= -400

\(34.\left(66-4\right)-66.\left(34+4\right)\\ =34.66-34.4-66.34-66.4\\ =\left(34-34-4\right).66-34.4\\ =-4.66-34.4\\ =4.\left(-66\right)-34.4\\ =4.\left(-66-34\right)\\ =4.\left(-100\right)\\=-400\\ -264.\left(-400\right).264.40\\ =264.400.264.40\\ =264.4.100.264.4.10\\ =264.4.264.4.\left(100.10\right)\\ =\left(264.4\right)^2.1000\\ =1115136.1000=1115136000\)

ngu

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

200

mk kick bn òi đó

\(66+34+34+66\)

\(=\left(66+34\right)+\left(34+66\right)\)

\(=100+100\)

\(=100.2\)

\(=200\)

= 200 nhé

34(66-5)-66(34+5)=34.66-34.5-34.66-66.5=(34.66-34.66)-5(34+66)=-500

=34x66-34x5 -66x34-66x5

=-34x5-66x5

=5x(-34-66)=5x(-100)=-500

34.(66-5)-66.(34+5)=(34-34).(66-66).(5+5)=0.0.10=0

       \(34.\left(66-5\right)-66.\left(34+5\right)\)

\(=34.66-34.5-66.34-66.5\)

\(=\left(34.66-66.34\right)-\left(34.5+66.5\right)\)

\(=0-\left(34+66\right).5\)

\(=0-100.5\)

\(=0-500\)

\(=-500\)

66 x 74 + 34 x 66 + 66 36 + 34 x64

= 66 x ( 74 + 34 +36 +64 )

= 66 x 208

= 13728

học tốt

66.74+34.66+66.36+34.64

=66 (74+34+36+34)

=13728

TL

66 x 74 + 34 x 66 + 66 x 36 + 34 x 64 

= (66 x ( 74 + 36))+(34 x ( 64 + 66))

=(66 x 110)+(34 x 130)

= 7260 + 4420

= 11680

* Excuse me, k cho mình nha cực hợp lí 

66.74+34.66+66.36+34.64

=66.74+66. 36+34.66+34.64

=66.(74+36)+34.(66+64)

=66.110+34.130

=7260+4420

=11680

66 x 74 + 34 x 66 + 66 x 36 + 34 x 64

= 11680

\(\dfrac{3^4.4-6^6}{\text{​3^5.5+10. 3^4}}\)

=\(\dfrac{3^4.2^2-\left(3.2\right)^6}{3^5.5+2.5.3^4}\)

=\(\dfrac{3^4.2^2-3^6.2^6}{3^4.5.\left(3+2\right)}\)

=\(\dfrac{3^4.2^2.\left(1-3^2.2^2\right)}{3^4.5^2}\)

=\(\dfrac{3^4.2^2.\left(-35\right)}{3^4.5^2}\)

=\(\dfrac{2^2.\left(-7\right).5}{5^2}\)

=\(\dfrac{2^2.\left(-7\right)}{5}\)=\(\dfrac{-28}{5}\)