Question

solve using properties. (1) 2×1768×50. (2) 15×(-25)×4×(-10) (3) 297×17+297×13 (4) 625×(-35)+(-625)×65 (5) (-41)×102​

Answer 1

Answer:

1.176800

2.15000

3.8370

4.-62500

5.-1428

Answer 2

Answers:

1) 2 × 1768 × 50 = (2 × 50) × 1768 = 100 × 1768 = 176800

2) 15 × (-25) × 4 × (-10) = {(-25)×4} × {15×(-10)} = {-100} × {-150} = 15000

3) 297×17 + 297×13 = 297 × (17+13) = 297 × 30 = 8910

4) 625×(-35) + (-625)×65 = 625×(-35) + 625×(-65) = 625 × (-100) = (-62500)

5) (-41) × 102 = (-41) × (100+2) = (-41)×100 + (-41)×2 = (-4100) + (-82) = (-4182)