25 x 80 + 25 : 0,125 + 25 : 0,1 + 25 : 0,5

= 25 x 80 + 25 x 8 + 25 x 10 + 25 x 2

= 25 x ( 80 + 8 + 10 + 2 )

= 25 x 100

= 2500

25 x 80 + 25 : 0,125 + 25 : 0,1 + 25 : 0,5

= 25 x 80 + 25 x 8 + 25 x 10 + 25 x 2

= 25 x ( 80 + 8 + 10 + 2 )

= 25 x 100

= 2500

25x80 + 25 : 0,125 + 25 : 0,1 + 25 : 0,5

= 25x80 + 25x8 + 25x10 + 25x2

= 25x(80 + 8 + 10 + 2)

= 25x100

= 2500

=(25x4)x165=165x100=16500

25 x 165 x 4

= 25 x 660

=16500

Ta có: 25 x 165 x 4 = ( 25 x 4 ) x 165 = 100 x 165 = 16500

Kết quả đúng: 16500 (nếu HS tính theo cách thông thường cho 0,5 điểm)

165 x 59 + 165 + 165 x 40

= 165 x (59 + 1 + 40)

= 165 x 100

= 16500

a.

\(4\times183\times25=4\times25\times183=100\times183=18300\)

b.

\(165\times59+165\times165\times40=165\times\left(59+1+40\right)=165\times100=16500\)

c.

\(56\times49:7=56\times\left(49:7\right)=56\times7=392\)

d.

\(67\times15-57\times15=15\times\left(67-57\right)=15\times10=150\)

165 x 59 + 165 + 165 x 40

= 165 x 59 + 165 x 1 + 165 x 40

= 165 x ( 59 + 1 + 40 )

= 165 x 100

= 16500

\(165\times59+165+165\times40\)

\(=165\times\left(59+1+40\right)\)

\(=165\times100\)

\(=16500\)

Tôi sai ở chỗ nào các bạn chỉ cho mik chỗ sai nhe

Đừng có sai liều 

25 x 67 x 4 = ( 25 x 4) x 67 = 100 x 67 = 6700

125 x 2 x 4 = ( 125 x 4) x 2 = 500 x 2 = 1000

67 x 5 x 2 = 67 x ( 5x2) = 67 x 10 = 670

50 x 78 x 2= ( 50 x 2) x 78 = 100 x78 = 7800

25 x 67 x 4 = (25 x 4) x 67 = 100 x 67 = 6700

125 x 2 x 4 = ( 125 x 4 ) x 2 = 500 x 2 = 1000

67 x 5 x 2 = 67 x ( 5 x 2) = 67 x 10 = 670

50 x 78 x 2 = ( 50 x 2 ) x 78 = 100 x 78 = 7800

25x4x67=6700

125x2x4=1000

67x(5x2)=670

50x2x78=7800

a: =150x70=10500

b: =999(15+85)=99900

c: =72072:72=1001

a.31500:3=10500

b.(165:11+85)x999

=(15+85)x999

=100x999

=99900

c.(72072:6):12

=12012:12

=1001

d.18180:36=505

a.31500:3=10500

b.(165:11+85)x999

=(15+85)x999

=100x999

=99900

c.(72072:6):12

=12012:12

=1001

d.18180:36=505

a) 19,17x25x4=19,17(25x4)=19,17x100=1917

b)1,79x(8x125)=1,79x1000=1790

chúc bạn học tốt

\(108\times5+108\times96-108=108\times\left(5+96-1\right)\)

                                                              \(=108\times100=10800\)

`108xx5+108xx96-108`

`=108xx(5+96-1)`

`=108xx100`

`=10800`