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

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 

34 . ( 66 - 5 ) - 66 . ( 34 + 5 )

= 34 . 61 - 66 . 39

= 2074 - 2574

= - 500

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

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

\(=-34.5-66.5\)

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

\(=5.\left(-100\right)\)

\(=-500\)

k mk nhe

\(34\times76+66\times110+34\times34\)

\(=34\times\left(76+34\right)+66\times110\)

\(=34\times110+66\times110=110\times\left(34+66\right)=110\times100=110000\)

34 x 76 + 66 x 110 + 34 x 34

= 34 x ( 76 + 34 ) + 66 x 110

= 34 x 110 + 66 x 110

= 110 x ( 34 + 66 )

= 110 x 100

= 11 000

=))

34 x 76 + 66 x 110 + 34 x 34

= 34 x ( 76 + 34 ) + 66 x 110

= 34 x 110 + 66 x 110

= 110 x ( 34 + 66 )

= 110 x 100 

= 110000

Study well 

Bạn k k lên điểm đâu lên mk k cần đâu ạ 

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

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