560 x 90 + 560 x 10

= 560 x  (90 + 10 )

= 560 x 100 

= 56000 

k minh nha minh k lai

560 x 90 + 560 x 10

= 560 x ( 90 + 10 )

= 560 x 100

= 56 000

560 + ( 90 x 10 )

= 560 x 100

=56000

Lời giải:
1. Bạn coi lại đề

2. $=234\times (1257-257)=234\times 1000=234000$

3. $=175\times (1274-273-1)=175\times 1000=175000$

4. $=(4\times 25)\times (125\times 8)=100\times 1000=100000$

1. ...............................

2. $=234\times (1257-257)=234\times 1000=234000$

3. $=175\times (1274-273-1)=175\times 1000=175000$

4. $=(4\times 25)\times (125\times 8)=100\times 1000=100000$

a) 425 x 3475 + 425 x 6525
= 425 x (3475 + 6525)
= 425 x 10000
= 4250000
b) 175 x 1274 - 175 x 273 - 175
= 175 x 1274 - 175 x 273 - 175 x 1
= 175 x (1274 - 273 - 1)
= 175 x 1000
= 175000

Xx15+Xx13=560x45

Xx15+Xx13=25200

Xx(15+13)=25200

Xx28=25200

X=25200:28

X=900

ai trả lời nhanh mk tích cho

X * 15 + X * 13 = 560 * 45

X * (15+13) = 25200

X *    28       =  25200

X                 =   900

Vậy X = 900

\(15+x\times13=560\times45\)

\(15+x\times13=25200\)

\(x\times13=25200-15\)

\(x\times13=25185\)

\(x=25185:13\)

\(x=8395\)

15+X x 13 = 25200

X x 13 = 25200-15

X x 13 = 25185

X = 25185/13

$15+x\times 13=560\times 45$

$15+x\times 13=25200$

$x\times 13=25200-15$

$x\times 13=25185$

$x=25185:13$

$x=8395$

nhớ tick tớ nhew

=> x( 1 +2 + 3 + 4 ) = 560

10x = 560

x = 560 : 10

x = 56 

125966400 nha bạn chúc bn hok tốt

Đáp án A