Question

Tính nhanh :

19,8 x 98 + 19,8 + 19,8

Answer 1

1980

Answer 2

\(19,8\times98+19,8\times2\)
\(=19,8\times\left(98+2\right)\)
\(=19,8\times100\)
\(=19800\)

Answer 3

=19,8×100=198

Answer 4

\(19,8\times98+19,8+19,8=19,8\times98+19,8\times2=19,8\times\left(98+2\right)=19,8\times100=1980\)

Answer 5

1980

Answer 6

=19,8✖(98+1+1)

=19,8✖100

=1980

Answer 7

= \(1980\)