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K:S HESHBON10atarNew site 8-2009דפי העשרה א - גכיתה ...
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Transcript of K:S HESHBON10atarNew site 8-2009דפי העשרה א - גכיתה ...
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422815 33
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42
42
2815
15
42 + 15 = 57
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3 × 10 + 4 × 5 + 2 × 1 = 52
1 × 10 + 3 × 5 + 2 × 1
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+ - ×
0 1 2 3
×
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+ = 8
= 1
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+ - ×
0 1 2 3
×
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+ = 8
= 1
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0 + 0 = 0 2 + 3 = 5
0 + 1 =1 3 × 2 = 6
3 - 1 = 2 3 × 2 + 1 = 7
3 × 1 = 3 2 × 2 + 3 + 1 = 8
2 × 2 = 4 3 × 3 = 9