a: =50-36=14

a) 5².2 – 3².4                                                 b) 58.75 + 58.50 – 58.25

c) 107 – {38 + [7.3² – 24 : 6 + (9 – 7)³]}:15 d) (-23) + 13 + ( - 17) + 57

a) 5² . 2 - 3² . 4           b) 58 . 75 + 58. 50 - 58 . 25

= 25 . 2 - 9 . 4              = 58 . ( 75 + 50 - 25 )

= 50 - 36                      = 58 . 100

= 14                             = 5800

a) 5² . 2 - 3² . 4           b) 58 . 75 + 58. 50 - 58 . 25

= 25 . 2 - 9 . 4              = 58 . ( 75 + 50 - 25 )

= 50 - 36                      = 58 . 100

= 14                             = 5800

c) 107 - { 38 + [ 7 . 3² - 24 : 6 + ( 9 - 7 )³]} : 15

= 107 - { 38 + [ 7. 9 - 4 + 2³]} : 15

= 107 - { 38 + [ 63 - 4 + 8]} : 15

= 107 - { 38 + [ 59 + 8]} : 15

= 107 - { 38 + 67 ]} : 15

= 107 - 105 : 15 

= 107 - 7

= 100

32 . 4 . 10

= 128 . 10

=   1 280

32.4*10 = 324

 tích trên là :

   32.4 * 10 = 324 

   đáp số 324

a) 32,4 x (6,34+3,66)+0,5

=32,4x10+0,5

=324+0,5

=324,5

b)(0,9x2)x438+0,18x2520+(0,6x3)x310

=0,18x438+0,18x2520+0,18x310

=0,18x(438+2520+310)

=0,18x3268

=588,24

cám ơn

tra trên này luôn à

(12-128).6=-116.6=-696

(12-32.4).(1+2+3)
= -116.6
= -696
hk tốt !

  ( 12 - 32 . 4 ) . ( 1 + 2 + 3 )

= ( 12 - 128 ) . 6

=     ( -116 ) . 6

=          - 696

`4,8:x=12,8xx0,75`

`4,8:x=9,6`

`x=4,8:9,6`

`x=0,5`

________________________________________________

`16,8xx x=32,4xx5,6`

`16,8xx x=181,44`

`x=181,44:16,8`

`x=10,8`

\(65.59+65.41-32.4\)

\(=65.\left(59+41\right)-32.4\)

\(=65.100-128\)

\(=6500-128\)

\(=6372\)

65.59+65.41-32.4

=65.(59+41).32-4

=65.100.28

=6500.28

=176000

65.59+65.41-32.4

=65.(59+41).32-4

=65.100.28

=6500.28

=176000

S bé =3,6

S lớn =36

Thank you