=10.000-47.(72+28)=10.000-47.1000=10.000-470.000=....(tự tính)

47 x{1000+[72+28]}

=47 x {1000 + 100}

=47 x 1100

=51700

=5300

đấy bạn

  \(10000-47\cdot72-47\cdot28\)

\(=10000-3384-1316\)

\(=6616-1316\)

\(=5300\)

10000 - 47 x 72 - 47 x 28

= 10000 - (47 x 72 + 47 x 28)

= 10000 - 47 x (72 + 28)

= 10000 - 47 x 100

= 10000 - 4700

= 5300

10000 - 47 × 72 - 47 × 28

= 100 × 100 - 47 × (72 + 28)

= 100 × 100 - 47 × 100

= 100 × (100 - 47)

= 100 × 53 = 5300

\(2b,\)\(54\times47-47\times53-20-27.\)

\(=47\times54-47\times53-47\)

\(=47\times\left(54-53-1\right)\)

\(=47\times0=0\)

\(2c,\)\(10000-47\times72-47\times28\)

\(=100\times100-47\times\left(72+28\right)\)

\(=100\times100-47\times100\)

\(=100\times\left(100-47\right)\)

\(=100\times53=5300\)

2b

54 x 47 - 47 x 53 - 20 - 27 = 47 x ( 54 - 53 ) - 20 - 27 = 47 - 20 - 27 = 47 - ( 20 + 27 ) = 47 - 47 = 0

2c

10000 - 47 x 72 - 47 x 28 = 10000 - 47 x ( 72 - 28 ) = 10000 - 47 x 44 = 10000 - 2068 = 7932

` 10000 – 47 xx 72 – 47 xx 28 `
`=10000-47xx(72+28)`
`=10000-47xx100`
`=100xx100-47xx100`
`=100xx(100-47)`
`=100xx53`
`=5300`

`10 000 - 47 xx 72 - 47xx28`

`=10 000 - 47 xx(72+28)`

`=10 000 - 47xx100`

`=10 000 - 4700`

`=5300`

 10000 – 47 x 72 + 47 x 28 

=10000-(47x(72+28)

=10000-4700

=5300

28 x 47 + 28 x 43 + 72 x 29 + 72 x 61

= 28 x ( 47 + 43 ) + 72 x ( 29 + 61)

= 28 x 90 + 72 x 90

= 90  x ( 28 + 72)

= 90 x 100

= 9 000

k mk nha

28 x 47 + 28 x 43 + 72 x 29 + 72 x 61

= 28 x (47 + 43) + 72 x (29 + 61)

= 28 x 90 + 72 x 90

= (28 + 72) x 90

= 100 x 90 = 9000

     28 x 47 + 28 x 43 + 72 x 29 + 72x 61

= 28( 47 + 43 ) + 72 x ( 61+ 29)

=28 x 90 + 72 x 90

= 90 x (28 + 72 )

= 90 x 100 = 9000

10000-47x72-47x28

=10000-47x72-47x47-28

=47x(10000-72-28)

=47x0

=0

MIK CHỈ GIẢI DƯỢC PHẦM ĐẦU THUI 
SORRY NHÉ

          = 47 x  (1000 - 72 - 28 )

          = 47 x 0 

          = 0

1000 - 47 . 72 - 47 .28

= 47 . ( 1000 - 72 -28 )

= 47 .0

=0

3457 - 27 . 48 - 48 .73 + 6543

=3457 - 48 . (27 + 73 ) + 6543

= 3457 - 4800 + 6543

= 5200

1000 - 47 . 72 - 47 .28

= 47 . ( 1000 - 72 -28 )

= 47 .0

=0

3457 - 27 . 48 - 48 .73 + 6543

=3457 - 48 . (27 + 73 ) + 6543

= 3457 - 4800 + 6543

= 5200

a) \(\left(145\times99+145\right)-\left(143\times102-143\right)\)

\(=\left[145\times\left(99+1\right)\right]-\left[143\times\left(102-1\right)\right]\)

\(=\left(145\times100\right)-\left(143\times101\right)\)

\(=14500-14443\)

\(=57\)

b) \(54\times47-47\times53-20-27\)

\(=47\times\left(54-53\right)-20-27\)

\(=47-20-27\)

\(=0\)

c) \(10000-47\times72-47\times28\)

\(=10000-47\times\left(72+28\right)\)

\(=10000-47\times100\)

\(=10000-4700\)

\(=5300\)

d) \(3457-27\times48-48\times73+6543\)

\(=\left(3457+6543\right)-48\times\left(27+73\right)\)

\(=10000-48\times100\)

\(=10000-4800\)

\(=5200\)