\(=45\times64+45\times34+45\times2\\ =45\times\left(64+34+2\right)\\ =45\times100=4500\)
= 45 x (64 + 34) +90
= 45 x 98 +90
= 4410 +90
= 4420
=45×64+45×34+45×2
=45×(64+34+2)
=45×100
=4500
45 x 64 + 45 x 34 + 90
= 45 x 64 + 45 x 34 + 45 x 2
= 45 x ( 64 + 34 + 2)
= 45 x 100
= 4500