(2x50)+(4x25)+(125x8) x3 = 3300

4 × 125 × 25 × 8

= (4 × 25) × (125 × 8)

= 100 × 1000

= 100 000

2 × 8 × 50 × 25 × 125

= (2 × 50) × (8 × 125) × 25

= 100 × 1000 × 125

= 12 500 000

2 × 3 × 4 × 5 × 50 × 25

= (2 × 50) × (4 × 25) × (3 × 5)

= 100 × 100 × 15

= 150 000

25 × 20 × 125 × 8 - 8 × 20 × 5 × 125

= 8 × 125 × 20 × (25 - 5)

= 1000 × 20 × 20

= 400 000

- (25 x 4) x (125 x8)=100 x 1000 =100000

- (50 x 2) x (8 x 125) x 25=100 x 1000 x 25 =2500000

- (2 x 50 ) x (4 x 25) x (3 x5)=100 x 100 x 15=150000

- 25 x 20 x125 x 8 - 5

= (20 x 5) x (125 x 8) -25=100 x 1000 -5 =100000 - 5 =99995

4 *125*25*8

=4*25*125*8

=100*1000

=100000

2*8*50*25*125

=2*50*8*125*25

=100*1000*25

=2500000

2*3*4*5*50*25

=2*50*4*25*3*5

=100*100*15

=150000

25*20*125*8-8*20*5*125

=25*4*5*125*8-8*125*20*5

=100*1000*5-1000*100

=500000-100000

=400000

=

1 : Tính nhanh:

a) 2376 + 3425 - 376 - 425 = ( 2376 - 376 ) + ( 3425 - 425 )

                                       = 2000 + 3000

                                       = 5000

b)4638 - 2437 + 5362 - 7563 = 2210 + ( - 2210 )

                                          = 0

c) 45 + 45 + 45 + 45 + 15 + 15 + 15 + 15

  = 45 x 4 + 15 x 4

 = ( 45 + 15 ) x 4

 = 60 x 4

 = 240

d) 4 x 125 x 25 x 8 = ( 4 x 25 ) x ( 125 x 8 )

                            = 100 x 1000

                            = 100000

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

                                   = 100 x 1000 x 25

                                   = 100000 x 25

                                   = 2500000

2 : Tính nhanh bằng 2 cách:

C1 : 125 + 125 + 125 + 125 - 25 - 25 - 25 - 25

    = ( 125 - 25 ) + ( 125 - 25) + ( 125 - 25 ) + ( 125 - 25 )

    =100 + 100 + 100 + 100 

    = 100 x 4 

    = 400

C2 : 125 + 125 + 125 + 125 - 25 - 25 - 25 - 25

     = 125 x 4 - 25 x 4

     = ( 125 - 25 ) x 4

     = 100 x 4

     = 400

1.

a. 5000
b. 0

c. 240

d. 100000

e. 2500000

2.

400

1: Tính nhanh:

a, 2376 + 3425 - 376 - 425

 = ( 2376 - 376 ) + ( 3425 - 425 )

 = 2000 + 3000

 = 5000.

b, 4638 - 2437 + 5362 - 7563

 = 2210 + (-2210)

 = 0.

c, 45 + 45 + 45 + 45 + 15 + 15 + 15 + 15 + 15

 = ( 45 + 15 ) +  ( 45 + 15 ) +  ( 45 + 15 ) +  ( 45 + 15 ) 

 = 60 + 60 + 60 + 60

 = 240.

d, 4 x 125 x 25 x 8 

 = ( 4 x 25 ) x ( 125 x 8 )

 = 100 x 1000

 = 100000.

e, 2 x 8 x 50 x 25 x 125

 = ( 2 x 50 ) x ( 8 x 125 ) x 25

 = 100 x 1000 x 25

 = 2500000.

2: Tính nhanh bằng hai cách:

  125 + 125 + 125 + 125 - 25 - 25 - 25- 25

= ( 125 - 25 ) + ( 125 - 25 ) + ( 125 - 25 ) + ( 125 -25 )

= 100 + 100 + 100 + 100

= 400.

134415-134415:45

=134415-2987

=131428

134415 - 134415 : 45 = 134415 - 2987

                                   = 131428

325 * 1574 - 325 * 325 - 325 * 249 = 325 * ( 1574 - 325 - 249 )

                                                       = 325 * 1000

                                                       = 325000

2 * 8 * 50 * 25 * 125 = ( 2 * 50 ) * 125 * ( 8 * 25 )

                                = 100 * 125 * 200

                                = 12500 * 200 

                               = 2500000

2 * 3 * 4 * 5 * 50 * 25 = ( 2 * 50 ) * ( 5 * 4 ) * ( 4 * 25 ) * 3 

                                  = 100 * 20 * 100 * 3

                                  = 100 * ( 20 * 3 )

                                  = 100 * 60

                                  = 6000

325 x 1574 -325 x 325 - 325 x 249= 325 x ( 1574-325-249)=325 x 1000= 325000

2 x 8 x 50 x 25 x 125 = ( 2 x 50) x ( 8 x 125) x 25 = 100 x 1000 x 25=2500000

2 x 3 x 4 x 5 x 50 x 25 = ( 2 x 50) x ( 25 x 4) x (3 x 5)=100 x 100 x 15 =150000

k cho mình nha!!!

2x3x4x850x25x125=31875000

t đi tôi k lại

\(2x3x4x8x50x25x125=\left(2x50\right)x\left(4x25\right)x\left(8x125\right)x3\)\(=100x100x1000x3=30000000\)

=31875000

t đi tôi t lại

2 x 3 x 4 x 8 x 50 x 25 x 125

          = 3 x 2 x 4 x 50 x 8 x 25 x 125

          = 3 x (2 x 50) x (4 x 25) x (8 x 125)

          = 30 000 000.

a, ( -4 ).125.( -25 ).( -8 ).( -6 )

= [ ( -4 ).( -25 ) ].[ 125.( -8 ) ].( -6 )

= 100.( -1000 ).( -6 )

= ( -100 000).( -6 )

= 600 000

b, ( -2 ).12.( -50 )

= [ ( -2 ).( -50 ) ].12

= 100.12 = 1200

c, ( -25 ).( - 26 ).( - 4 )

= [ ( -25 ).( -4 ) ].( - 26 )

= 100.( -26 ) = -2600

a) (-4) . 125 . (-25) . (-8) . (-6)

= (-4). (-25) . 125 . (-8) - (-6)

= 100 . (-1000) . (-6)

= -100000 . (-6)

=600000

b)(-2).12.(-50)

= (-2) . (-50) . 12

= 100 . 12

= 1200

a, Ta có:
1996 + 3992 + 5988 + 7984
= 1 x 1996 + 2 x 1996 + 3 x 1996 + 4 x 1996
= (1 + 2 + 3 + 4) x 1996
= 10 x 1996
= 19960
b, 2 x 3 x 4 x 8 x 50 x 25 x 125
= 3 x 2 x 4 x 50 x 8 x 25 x 125
= 3 x (2 x 50) x (4 x 25) x (8 x 125)

= 30 000 000.