=98,05 * (25,78 + 73,22 + 1)

=98,05*100

=9805

98,05 * 25,78 + 98,05 * 73,22 + 98,05

= 98,05 * 25,78 + 98,05 * 73,22 + 98,05 * 1

= 98,05 * ( 25,78 + 73,22 + 1 )

= 98,05 * 100

= 9805

98,05 x 7,3 + 98,05 x 4,6 - 98,05 x 1,9

= 98,05 x ( 7,3 + 4,6 - 1,9 ) 

= 98,05 x 10

= 980,5

k cho mk nha

mọi người giúp mình nhanh nhé

a,   4,6x98,05-4,6x98,04

    =4,6x(98,05-98,04)

    =4,6x0,01

    =0.046

12,3 X 0,15 - 0,03 X 12,3 - 0,02 X 12,3

= 12,3 X ( 0,15 - 0,03 - 0,02 )

= 12,3 X 0,1

= 1,23

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

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

chúc bạn học tốt

\(=21,37\cdot\left(27,5+72,4+0,1\right)=21,37\cdot100=2137\)

=21,37⋅(27,5+72,4+0,1)=21,37⋅100=2137

\(=21,37\cdot27.5+72.4+21.37+21.37\cdot0.1\)

\(=21.37\left(27.5+72.4+0.1\right)=21.37\cdot100=2137\)

=>2137

\(=25,17\times\left(16,9-16,8\right)\\ =25,17\times1=25,17\)

25,17 x 16,9 - 25,17 x 16,8 

= 25,17 x ( 16,9 - 16,8 )

= 25,17 x 0,1

= 2,517

25,17 x 16,9 - 25,17 x 16,8

=25.17 x(16.9 - 16.8)

=25.17 x 0.1

=2.517

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

                                                              \(=108\times100=10800\)

`108xx5+108xx96-108`

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

`=108xx100`

`=10800`

\(419:\left(8\times8\times4,18+0,17\times2,5+2,09\times2\times36+0,23\times2,5\right)\)

\(=419:\left(64\times4,18+0,17\times2,5+4,18\times36+0,23\times2,5\right)\)

\(=419:\left[\left(64+36\right)\times4,18+\left(0,17+0,23\right)\times2,5\right]\)

\(=419:\left[100\times4,18+0,4\times2,5\right]\)

\(=419:\left[418+1\right]\)

\(=419:419\)

\(=1\)

\(=\dfrac{419}{64\cdot4.18+0,17\cdot2,5+2,09\cdot72+0,23\cdot2,5}\)

\(=\dfrac{419}{0,4\cdot2,5+64\cdot4,18+2,09\cdot72}\)

\(=\dfrac{419}{1+418}=1\)