Question

(-18) $\times$ 45 + (-18) $\times$ (-64) = ?

• A. -342
• B. 342
• C. -234
• D. 234

Answer 1

The correct option is B

342

Using distributive law of multiplication over addition

(-18) $\times$ 45 + (-18) $\times$ (-64)

= (-18) $\times$ [45 + (-64)]

= (-18) $\times$ (45 - 64)

= (-18) $\times$ (-19)

= 18 $\times$ 19

= 342