\(4\times826\times125\times2\\=(4\times2\times125)\times826\\=(8\times125)\times826\\=1000\times826\\=826000\)

\(4\times826\times125\times2\)

\(=\left(4\times125\times2\right)\times826\)

\(=\left(500\times2\right)\times826\)

\(=1000\times826\)

\(=826000\)

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

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

chúc bạn học tốt

b. 2 x 8 x 50 x 25 x 125 = (2 × 50) × (8 × 125) × 25

= 100 × 1000 × 25

= 100000 × 25

= 2500000

= ( 2x50) x ( 8x125) x 25

= 100 x 1000 x 25

100000 x 25

= 2500000

b. 2 x 8 x 50 x 25 x 125 = (2 × 50) × (8 × 125) × 25

= 100 × 1000 × 25

= 100000 × 25

= 2500000

`@` `\text {Ans}`

`\downarrow`

`a)`

`20 \times 6 \times 5 \times 7`

`= (6 \times 7) \times (20 \times 5)`

`= 42 \times 100`

`= 4200`

`b)`

`125 \times 789 \times 8`

`= (125 \times 8) \times 789`

`= 1000 \times 789`

`= 789000`

`c)`

`2 \times 3 \times 4 \times 8 \times 50 \times 25 \times 125`

`= (2 \times 50) \times 3 \times (4 \times 25) \times (8 \times 125)`

`= 100 \times 3 \times 100 \times 1000`

`= 300000000`

a) 20 x 6 x 5 x 7

= ( 20 x 5 ) x ( 6 x 7 )

= 100 x 42

= 4200

a, 2x9x5x7x4x25

=2x5x4x25x9x7

=10x100x63

=63000

BẠN SAO THẾ A VÀ B dõ dàng

a, 4 x 25 x 9

= 100 x 9

= 900

b, 125 x 8 x 6

= 1000 x 6

= 6000

// bn cak lm sai conme đề rồi ạ?//

2 câu đấy à?

\(125+173+175+27=\left(125+175\right)+\left(173+27\right)=300+200=500\)

\(125\times75+125\times25=125\times\left(75+25\right)=125\times100=12500\)

125 x 12 + 12 x 874 + 12

=       ( 125 + 874 + 1 ) x 12

=            1000  x  12

=             12 000

Trả lời :

25 x 8 x 50 x 125 x 4 x 2

= ( 25 x 4 ) x ( 8 x 125 ) x ( 50 x 2 )

= 100 x 1000 x 100

= 100 000 000

~HT~

#sad