33 x 55 + 33 x 66 - 33 x 21
= 33 x ( 55 + 66 - 21 )
= 33 x 100
= 3300
\(33.55+33.66-33.21=33.\left(55+66-21\right)=33.100=3300\)
\(33\cdot55+33\cdot66-33\cdot21\)
\(=33\cdot\left(55+66-21\right)\)
\(=33\cdot100\)
\(=3300\)
\(33\cdot55+33\cdot66-33\cdot21\)
\(=33\left(55+66-21\right)\)
\(=33\left(121-21\right)\)
\(=33\cdot100\)
\(=3300\)
\(33\cdot55+33\cdot66-33\cdot21\)
\(=33\cdot\left(55+66-21\right)\)
\(=33\cdot100\)
\(=3300\)
