Question

Вычисли удобным способом:(8×4)×5 6×(8×10) 3×(8×5) (7×5)×6 (9×20)×5 (20×5)×17 4×(40×5) 50×(2×3)

Answer 1

8x(4x5)=160 7x(5x6)=210

Answer 2

(4х5)х8
(6х8)х10
(3х5)х8
(5х6)х7
(20х5)х9
(17х5)х20
(4х5)х40
(50х2)х3

Answer 3

Давайте вычислим каждое выражение по очереди:

(8 × 4) × 5 = 32 × 5 = 160

6 × (8 × 10) = 6 × 80 = 480

3 × (8 × 5) = 3 × 40 = 120

(7 × 5) × 6 = 35 × 6 = 210

(9 × 20) × 5 = 180 × 5 = 900

(20 × 5) × 17 = 100 × 17 = 1700

4 × (40 × 5) = 4 × 200 = 800

50 × (2 × 3) = 50 × 6 = 300

Таким образом:

(8 × 4) × 5 = 160 6 × (8 × 10) = 480 3 × (8 × 5) = 120 (7 × 5) × 6 = 210 (9 × 20) × 5 = 900 (20 × 5) × 17 = 1700 4 × (40 × 5) = 800 50 × (2 × 3) = 300