Question

Tính bằng cách thuận tiện nhất: 123 x 6 + 123 + 3 x 123

Answer 1

=123x10=1230

Answer 2

\(=123\times\left(6+3+1\right)\)
\(=123\times10\)
\(=1230\)

Answer 3

\(123\times6+123+3\times123\\ =123\times\left(6+1+3\right)\\ =123\times10\\ =1230\)

Answer 4

123×6+123+3×123=123×(6+1+3)=123×10=1230