💣 Q :72 Prep 1 Question Bank T1

Use the properties of multiplication in \(\mathbb{Z}\) to find:

a) \( -4 \times (-19) \times 25 \)

b) \( 8 \times 77 \times (-125) \)

c) \( (-2) \times (-25) \times (-50) \times 4 \)

a) \( -4 \times (-19) \times 25 \)
\( = (-4 \times 25) \times (-19) \)
\( = (-100) \times (-19) = 1900 \)

b) \( 8 \times 77 \times (-125) \)
\( = (8 \times -125) \times 77 \)
\( = (-1000) \times 77 = -77000 \)

c) \( (-2) \times (-25) \times (-50) \times 4 \)
\( = [(-2) \times (-50)] \times [(-25) \times 4] \)
\( = 100 \times (-100) = -10000 \)