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katyakristya
@katyakristya
August 2022
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виконай віднімання способом округлення наприклад73-5=73-10+5=58,46-6=,67-9=,51-8=,22-7=,73-6=,62-4=.
Запиши числа у вигляді суми розрядних доданків
49=,17=,85=.
Обчисли 2 способами
1.спосіб47+26=
2спосіб 47+26=
1спосіб 34+58=
2спосіб 34+58=
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keepangels
Следовательно примеру; 73-5=73-10+5=58, будет вот так:
46-6=46-10+6=30
67-9=67-10+9=48
51-8=51-10+8=33
22-7=22-10+7=5
73-6=73-10+6=57
62-4=62-10+4=48
2) 49=40+9
17=10+7
85=80+5
3) 47 + 26 = (40 + 7) + (20 + 6) = (40 + 20) + (7 + 6) = 60 + 13 = 73
47 + 26 = 47 + (3 + 23) = (47 + 3) + 23 = 50 + 23 = 73
47 + 26 = (43 + 4) + 26 = 43 + (4 + 26) = 43 + 30 = 73
34 + 58 = (30 + 4) + (50 + 8) = (30 + 50) + (4 + 8) = 80 + 12 = 92
34 + 58 = 34 + (6 + 52) = (34 + 6) + 52 = 40 + 52 = 92
34 + 58 = (32 + 2) + 58 = 32 + (2 + 58) = 32 + 60 = 92
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Answers & Comments
46-6=46-10+6=30
67-9=67-10+9=48
51-8=51-10+8=33
22-7=22-10+7=5
73-6=73-10+6=57
62-4=62-10+4=48
2) 49=40+9
17=10+7
85=80+5
3) 47 + 26 = (40 + 7) + (20 + 6) = (40 + 20) + (7 + 6) = 60 + 13 = 73
47 + 26 = 47 + (3 + 23) = (47 + 3) + 23 = 50 + 23 = 73
47 + 26 = (43 + 4) + 26 = 43 + (4 + 26) = 43 + 30 = 73
34 + 58 = (30 + 4) + (50 + 8) = (30 + 50) + (4 + 8) = 80 + 12 = 92
34 + 58 = 34 + (6 + 52) = (34 + 6) + 52 = 40 + 52 = 92
34 + 58 = (32 + 2) + 58 = 32 + (2 + 58) = 32 + 60 = 92