1) Закончи решение.
35 * 20 = 35 * (2 * 10)
25 * 24 = 25 * (4 * 6)
2)
16 * 30
42 * 20
12 * 40
25 * 16
15 * 18
45 * 14
13 * 60
45 * 20
15 * 30
14 * 50
35 * 20 = 35 * (2 * 10) = (35 * 2) * 10 = 70 * 10 = 700
25 * 24 = 25 * (4 * 6) = (25 * 4) * 6 = 100 * 6 = 600
16 * 30 = 16 * (3 * 10) = (16 * 3) * 10 = 48 * 10 = 480
42 * 20 = 42 * (2 * 10) = (42 * 2) * 10 = 84 * 10 = 840
12 * 40 = 12 * (4 * 10) = (12 * 4) * 10 = 48 * 10 = 480
25 * 16 = 25 * (4 * 4) = (25 * 4) * 4 = 100 * 4 = 400
15 * 18 = 15 * (2 * 9) = (15 * 2) * 9 = 30 * 9 = 270
45 * 14 = 45 * (2 * 7) = (45 * 2) * 7 = 90 * 7 = 630
13 * 60 = 13 * (6 * 10) = (13 * 6) * 10 = 78 * 10 = 780
45 * 20 = 45 * (2 * 10) = (45 * 2) * 10 = 90 * 10 = 900
15 * 30 = 15 * (3 * 10) = (15 * 3) * 10 = 45 * 10 = 450
14 * 50 = 14 * (5 * 10) = (14 * 5) * 10 = 70 * 10 = 700