Question

198 * 78 + 198 * 21 + 198

Answer 1

198*78+198*21+198

=198*78+198*21+198x1

=198x(78+21+1)

=198x100

=19800

ai k mình mình k lại

Answer 2

198 x 78 + 198 x 21 + 198

= 198 x ( 78 + 21 + 1 )

= 198 x 100

= 19800

Answer 3

\(198\times78+198\times21+198\)

\(=198\times\left(78+21+1\right)\)

\(=198\times100\)

\(=19800\)

Answer 4

198 x 78 + 198 x 21 + 198

= 198 x ( 78 + 21 + 1)

=198 . 100 = 19800

Answer 5

198 x 78 + 198 x 21 + 198

= 198 x ( 78 + 21 + 1 )

= 198 x 100

= 19800

đ/s : 19800

nhé !

Answer 6

198 x 78 + 198 x 21 + 198

= 198 x 78 + 198 x 21 + 198 x 1

= 198 x ( 78 + 21 + 1 )

= 198 x 100

= 19 800