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. 60
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(. 1).
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(102 ) .(. 1).
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. (23) .
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. (40) .
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12=21:3+1=8.
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23 =42-40=2.
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31=13,5+2,5=16.
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3 =13,5:3=4,5.
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2,5 2. 1 2 9 3. 3 1.
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. 1 II :
12 = (+3) -(II+4c):2=65–64 : 2 = 0,5. 2
5, 2 . 2 1. ( ). . 54 .18.
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. 1 1/3 (7) 3 ( ). 3 6 3. 3 4 4, 3 - 3 4.
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57 = 13,5:3 = 4,5 .
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. II (60) I (53) 1.
1= 60 - 53 = 7.
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1 1 , 12, 3:
13= 12.
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. 105, (35,5) 4.
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. 5 1/4 54(4,65) 3. 3 . 3 4 3 4.
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