Question

    Tính nhanh 

   58.07 x 6.78 - 58.07 x 6.68

   11 x 46.79 - 46.79

101 x 0.128 - 0.128

  11 x 91.46 -91.46

Answer 1

58,07 x 6,78 - 58,07 x 6,68

= 58,07 x ( 6,78 - 6,68 )

= 58,07 x 0,1

= 5,807

11 x 46,79 - 46,79

= 11 x 46,79 - 46,79 x 1

= 46,79 x ( 11 - 1 )

= 46,79 x 10

= 467,9

101 x 0,,128 - 0,128

= 101 x 0,128 - 0,128 x 1

= 0,128 x ( 101 - 1 )

= 0,128 x 100

= 12,8

11 x 91,46 - 91,46

= 11 x 91,46 - 91,46 x 1

= 91,46 x ( 11 - 1 ) 

= 91,46 x 10

= 914,6

Answer 2

58,07 x 6,78 - 58,07 x 6,68

= 58,07 x (6,78 - 6,68)

= 58,07 x 0,1

= 5,807

11 x 46,79 - 46,79

= 11 x 46,79 - 46,79 x 1

= 46,79 x (11 - 1)

= 46,79 x 10

= 467,9

101 x 0,128 - 0,128

= 101 x 0,128 - 0,128 x 1

= 0,128 x (101 - 1)

= 0,128 x 100

= 12,8

11 x 91,16 - 91,16

= 11 x 91,16 - 91,16 x 1

= 91,16 x (11 - 1)

= 91,16 x 10

= 911,6