( 1996 + 7984 ) + ( 3992 + 5988 ) = 9980 + 9980 = 19960

1996+3992+5988+7984

=1x1996+2x1996+3x1996+4x1996

=(1+2+3+4)x1996

=10x1996

=19960

k minh với

1996 + 3992 + 5988 + 7984

= ( 1996 + 7984 ) + ( 3992 + 5998 )

= 9980 + 9980

= 9980 x 2

= 19960

1996+3992+5988+7984

= (1996+7984)+(3992+5988)

= 9980+9980

= 9980x2

= 19960

1996 + 3992 + 5998 + 7984 

= ( 1996 + 7984 ) + ( 5988 + 3992 )

= 9980 + 9980

= 9980 x 2

= 19960

1996+3992+5988+7984

=(1996+7984)+(3992+5988)

=9980+9980

=19960

Nhớ

a) \(2\times3\times4\times8\times25\times50\times125\)

\(=\left(2\times50\right)\times\left(4\times25\right)\times\left(8\times125\right)\times3\)

\(=100\times100\times100\times3\)

\(=3000000\)

b) \(1996+3992+5988+7984\)

\(=\left(1996+7984\right)+\left(3992+5988\right)\)

\(=9980+9980\) -> đoạn này thấy hết nhanh ròi bạn.

\(=19960\) 

cảm ơn bn nhiều

(1996+7984)+(3992+5998)

=19960

ủng hộ nha

=(3992+5988)+(7984+1996)

=9980+9980

=19960

1996 + 3992 + 5988 + 7984 = ( 1996 + 7984 ) + ( 3992 + 5988 )

= 9980 + 9980

=19960

1996 + 3992 + 5988  +7984

= (1996 + 7984) + (3992 + 5988)

= 9980 + 9980

= 9980 x 2 

= 19960

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

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.

tính nhanh à bn

a, 17,58 x 43 + 57 x 17,58

=17,58x(43+57)

=17,58x100

=1758

b, 43,57 x 2,6 x ( 630 - 315 x 2 )

= 43,57 x 2,6 x0

=0

c, 1996 + 3992 + 5988 + 7984

=1996+7984+3992+5988

=9980+9980

=2x9980

=19960

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

=8x125x4x25x6

=1000x100x6

=1000x600

=600000

~~~~~~~~~~~~Ai đi qua nhớ để lại

a) 17,58 x 43 + 57 x 17,58

   = 17,58 x ( 43 + 57)

  = 17,58 x 100

    = 1758

b) 43,57 x 2,6 x ( 630 - 315 x 2 )

  =43,57 x 2,6 x 0 

   = 0

c) 1996 + 3992 + 5988 + 7984

=(1996 + 7984) +( 3992 + 5988)

= 9980 +9980

= 19960

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

= 100 x 100 x 1000 x 3

= 30000000

1) 1996 + 3992 + 5988 + 7984 
= 1996 x 1 + 1996 x 2 + 1996 x 3 + 1996 x 4 
= 1996 x ( 1 + 2 + 3 + 4) 
= 1996 x 10 = 19960 
2) 2 x 3 x 4 x 8 x 50 x 25 x 125 
= 3 x (2 x 50) x (4 x 25) x (8 x 125) 
= 3 x 100 x 100 x 1000 
= 30.000.000 
3(45 x 46 + 47 x 48) x (51 x 52 - 49 x 48) x (45 x 128 - 90 x 64) 
x (1995 x 1996 + 1997 x 1998) 
Ta thÊy : 45 x 128 - 90 x 64 
= 45 x 2 x 64 - 90 x 64 
= 90 x 64 - 90 x 64 
= 0 

1) 1996 + 3992 + 5988 + 7984 
= 1996 x 1 + 1996 x 2 + 1996 x 3 + 1996 x 4 
= 1996 x ( 1 + 2 + 3 + 4) 
= 1996 x 10 = 19960 
2) 2 x 3 x 4 x 8 x 50 x 25 x 125 
= 3 x (2 x 50) x (4 x 25) x (8 x 125) 
= 3 x 100 x 100 x 1000 
= 30.000.000 
3(45 x 46 + 47 x 48) x (51 x 52 - 49 x 48) x (45 x 128 - 90 x 64) 
x (1995 x 1996 + 1997 x 1998) 
Ta thÊy : 45 x 128 - 90 x 64 
= 45 x 2 x 64 - 90 x 64 
= 90 x 64 - 90 x 64 
= 0 

L I K E NHÁ BẠN^^

1  1996 + 3992 + 5988 +7984

= [ 1996 + 7984 ] + [ 5988 + 3392 ]

=           9980      +            9380

=                         19360