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Simplify

i. -4 x 5

ii. \(\frac{5}{7}\times(-15)+\frac{2}{7}\times(-15)\)

iii. \((-4)\div(\frac{-5}{2})\)

iv. (-1)4 x (-1)5 x (-1)2 x (-1)7

v. (-2) x (-7) x 8 x (-3)

1 Answer

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Best answer

i. -4 x 5 = -20

ii. \(\frac{5}{7}\)(-15) + \(\frac{2}{7}\)(-15)

iii. \(-4\div(\frac{-5}{2})\)

\(-4\times\frac{-2}{5}=\frac{8}{5}\)

iv. (-1)4 x (-1)5 x (-1)2 x (-1)7

= 1 x (-1) x 1 x (-1)

= -1 x -1 = 1

v. (-2) x (-7) x 8 x (-3)

14 x 8 x -3

14 x -24 = -336.

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