Завдання 10
У першому стовпчику запиши результати обчислень.
34 • 7 = (30 + 4) • 7 = 210 + 28 = 238
63 • 4 = (60 + 3) • 4 = 240 + 12 = 252
14 • 9 = (10 + 4) • 9 = 90 + 36 = 90 + 10 + 26 = 126
37 • 5 = (30 + 7) • 5 = 150 + 35 = 185
29 • 6 = (20 + 9) • 6 = 120 + 54 = 174
У другому виконай скорочений запис.
176 • 5 = (100 + 70 + 6) • 5 = 500 + 350 + 30 = 880
272 • 3 = (200 + 70 + 2) • 3 = 600 + 210 + 6 = 816
198 • 4 = (100 + 90 + 8) • 4 = 400 + 360 + 32 = 792
315 • 3 = (300 + 10 + 5) • 3 = 900 + 30 + 15 = 945
246 • 2 = (200 + 40 + 2) • 2 = 400 + 80 + 4 = 484
Завдання 11
8 • 36 = 8 • (30 + 6) = 240 + 48 = 288
6 • 139 = 6 • (100 + 30 + 9) = 600 + 180 + 54 = 780 + 20 + 34 = 834
4 • 207 = 4 • (200 + 7) = 800 + 28 = 828
3 • 327 = 3 • (300 + 20 + 7) = 900 + 60 + 21 = 981
Завдання 12
2 • 18 = 2 • (10 + 8) = 20 + 16 = 38
39 • 2 = (30 + 9) • 2 = 60 + 18 = 78
14 • 6 = (10 + 4) • 6 = 60 + 24 = 84
16 • 5 = (10 + 6) • 5 = 50 + 30 = 80
25 • 4 = (20 + 5) • 4 = 80 + 20 = 100
12 • 9 = (10 + 2) • 9 = 90 + 18 = 108
34 • 3 = (30 + 4) • 3 = 90 + 12 = 102
17 • 4 = (10 + 7) • 4 = 40 + 28 = 68
5 • 38 = 5 • (30 + 8) = 150 + 40 = 190
19 • 5 = (10 + 9) • 5 = 50 + 45 = 95
74 • 2 = (70 + 4) • 2 = 140 + 8 = 148
37 • 4 = (30 + 7) • 4 = 120 + 28 = 148
36 • 5 = (30 + 6) • 5 = 150 + 30 = 180
7 • 18 = 7 • (10 + 8) = 70 + 56 = 70 + 30 + 26 = 126
18 • 5 = (10 + 8) • 5 = 50 + 40 = 90
47 • 3 = (40 + 7) • 3 = 120 + 21 = 141
66 • 2 = (60 + 6) • 2 = 120 + 12 = 132
7 • 12 = 7 • (10 + 2) = 70 + 14 = 84