Question

câu C bài lúc nãy toi đăng lộn ảnh :<

Answer 1

\(c,=3.\left\{140:\left[16+3.\left(6+3.4\right)\right]\right\}-1\\ =3.\left\{140:\left[16+3.18\right]\right\}-1\\ =3.\left[140:\left(16+54\right)\right]-1\\ =3.\left(140:70\right)-1\\ =3.2-1\\ =6-1\\ =5\)

Answer 2

a) \(66+27-12=81\)

b) \(53\cdot64+53\cdot36=53\cdot\left(64+36\right)=53\cdot100=5300\)

c) \(3\cdot\left\{140:\left[16+3\cdot\left(6+3\cdot2^2\right)\right]\right\}-3^0\)

\(=3\cdot\left\{140:\left[16+3\cdot18\right]\right\}-1\)

\(=3\cdot\left\{140:70\right\}-1\)

\(=3\cdot2-1\)

\(=5\)

Answer 3

`a) 66 + 27 - 12 = 93 -12 = 81`

`b) 53 . 64 + 53 . 36 = 53 . ( 36 + 64 ) = 53 . 100 = 5300`

`c) 3 . { 140 : [ 16 + 3 . ( 6 + 3 . 2^2 )]} - 3^0`

`= 3 . { 140 : [ 16 + 3 . ( 6 + 3 . 4 )]} - 1`

`= 3 . { 140 : [ 16 + 3 . ( 6 + 12 )]} - 1`

`= 3 . { 140 : [ 16 + 3 . 18 )]} - 1`

`= 3 . { 140 : [ 16 + 54 ] } - 1`

`= 3 . { 140 : 70 } - 1`

`= 3 . 2 - 1`

`= 6  - 1`

`=5`

Answer 4

a) 

b) 

c)