a: =24*1000=24000

b: =120*1000=120000

c: =72(135+65):25-140

=72*8-140=436

d: =18(957-354-621):72=-9/2

a) 6*1235*20-5*235*24 = 120(1235-235)=120.1000=120000

b) =[145*99+145*1]-[143101*1]=145*[99+1]-145*[101-1]=145*100-143*100=100*[145-143]=100*2=200

Giúp tui zới

giuuuuuuuuuuuuuuuuuup minh với cau 60% nhan x cong ......

\(a,8\times427\times3+6\times573\times4\)

\(=24\times427+24\times573\)

\(=24\times\left(427+573\right)\)

\(=24\times1000\)

\(=24000\)

\(b,6\times1235\times20-5\times235\times24\)

\(=120\times1235-120\times235\)

\(=120\times\left(1235-235\right)\)

\(=1235\times1000\)

\(=1235000\)

a: =24x427+24x573

=24000

<=> 10x-9,9=0,1.x+9,9

<=> 100x-99=x+99

<=> 99x=99+99

<=> 99x=198  => x=198:99 => x=2

Đáp số: x=2

trl sẽ có like

a=8x3x6x4x(427+573)

a=8x3x6x4x1000

a=576000

\(8\cdot427\cdot3+6\cdot573+46\cdot1235\cdot20-5\cdot235\cdot24\)

\(=4\cdot2\cdot427\cdot3+6\cdot573+23\cdot2\cdot1235\cdot20-5\cdot235\cdot4\cdot3\cdot2\)

\(=4\cdot427\cdot6+6\cdot573+23\cdot2\cdot247\cdot5\cdot20-20\cdot5\cdot47\cdot3\cdot2\)

\(=6\cdot\left(4\cdot427+573\right)+23\cdot247\cdot200-47\cdot3\cdot200\)

\(=6\cdot\left(1708+573\right)+23\cdot\left(200+47\right)\cdot200-47\cdot3\cdot200\)

\(=6\cdot2281+23\cdot200\cdot200+23\cdot47\cdot200-47\cdot3\cdot200\)

\(=13686+23\cdot40000+20\cdot200\cdot47\)

\(=13686+920000+4000\cdot47\)

\(=13686+920000+188000\)

\(=13686+\left(920000+188000\right)\)

\(=13686+1108000=1121686\)

trời ơi là trời

làm đúng mà dis

mệt quá là mệt

thằng mô dis tui hử khai mau

tui dis hết luôn cho mà coi

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

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

A = 10 000 - 48 \(\times\) ( 27 + 73)

A = 10 000 - 48 \(\times\) 100

A = 100 \(\times\) ( 100 - 48)

A = 100 \(\times\) 52

A = 5200

A = 3457 - 27$\times$ 48 - 48 $\times$ 73 + 6543

A =(3457 + 6543) - ( 27 $\times$ 48 + 48 $\times$ 73)

A = 10 000 - 48 $\times$ ( 27 + 73)

A = 10 000 - 48 $\times$ 100

A = 100 $\times$ ( 100 - 48)

A = 100 $\times$ 52

A = 5200

HT!