Question

100 x 9 + 100 x 91 x 30 - 21 = ?

Answer 1

100 x 9 + 100 x 91 x 30 - 21

= 100 x ( 9 + 91 x 30 ) - 21

= 273900 - 21

= 273879

Answer 2

100 x 9 + 100 x 91 x 30 - 21

= 100 x ( 9 + 91 ) x 30 - 21

= 100 x 100 x 30 - 21

= 10 000 x 30 - 21

= 300 000 - 21

= 299 979

_Học _ tốt_

Answer 3

273879

Answer 4

\(100\times9+100\times91\times30-21\)

\(=900+9100\times30-21\)

\(=900+273000-21\)

\(=900+272979\)

\(=273879\)

hok tốt ~~

Answer 5

100×9+100×91×30−21

=900+9100×30−21

=900+273000−21

=900+272979

=273879