Find the product and check for equality: 18 `xx` (-5) and (-5) `xx` 18

Find the product and check for equality: 31 xx (-6) and (-6) xx 31

Find the product and check for equality: 4 xx 51 and 51 xx 4

Find the values of the following and check for equality: (-6) xx (4 + (-5)) and ((-6) xx 4) + ((-6) xx (-5))

Find the values of the following and check for equality: (-3) xx [2 + (-8)] and [(-3) xx 2] + [(-3) xx 8]

(-5) - (-18)

Find the product of the following: (-9) xx (-8)

Find the product of the following: (-50) xx 2 xx (-10)

Find the product of the following: (-30) xx 40 xx (-1)

Find the product of the following: (-20) xx (-45)