Question

Evaluate the following, using distributive property.
1) - 39 x 99
2) (-85) x 43 +43 x ( - 15)
3) 53 x (-9) - (-109) x 53
4) 68 x (-17) + (- 68 ) x 3

Answer 1

1) –39×99 = –39×(100–1)
= –39×100 –39×–1
= –3900+39
= –3861
2) –85×43+43×–15 = 43×(–85–15)
= 43×–100
= –4300
3) 53×–9–(–109)×53 = 53×(–9+109)
= 53×100
= 5300
4) 68×–17+3×–68 = 68×(–17–3)
= 68×–20
= –1360