Вычислите произведение чисел:
а) 24 * 2;
б) 31 * 3;
в) 52 * 4;
г) 71 * 9;
д) 23 * 8;
е) 9 * 18;
ж) 65 * 4;
з) 76 * 5;
и) 48 * 9;
к) 8 * 34;
л) 7 * 85;
м) 9 * 78.
24 * 2 = (20 + 4) * 2 = 20 * 2 + 4 * 2 = 40 + 8 = 48
31 * 3 = (30 + 1) * 3 = 30 * 3 + 1 * 3 = 90 + 3 = 93
52 * 4 = (50 + 2) * 4 = 50 * 4 + 2 * 4 = 200 + 8 = 208
71 * 9 = (70 + 1) * 9 = 70 * 9 + 1 * 9 = 630 + 9 = 639
23 * 8 = (20 + 3) * 8 = 20 * 8 + 3 * 8 = 160 + 24 = 184
9 * 18 = 9 * (10 + 8) = 9 * 10 + 9 * 8 = 90 + 72 = 162
65 * 4 = (60 + 5) * 4 = 60 * 4 + 5 * 4 = 240 + 20 = 260
76 * 5 = (70 + 6) * 5 = 70 * 5 + 6 * 5 = 350 + 30 = 380
48 * 9 = (40 + 8) * 9 = 360 + 72 = 432
8 * 34 = 8 * (30 + 4) = 8 * 30 + 8 * 4 = 240 + 32 = 272
7 * 85 = 7 * (80 + 5) = 7 * 80 + 7 * 5 = 560 + 35 = 595
9 * 78 = 9 * (70 + 8) = 9 * 70 + 9 * 8 = 630 + 72 = 702
Посмотреть калькулятор Натуральные числа