Question

45×18= (40×18) + ( dash) × 18).​

Answer 1

Answer:

$45×18= (40×18) +( 5 \: \times 18)$

5 will be there in empty space.

Answer 2

Answer:

45×18= (40× 18) + (5×18)

810= 720+90

810= 810

verified...

so the answer is 5