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matematika
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1. :
78 = ___ ___ 25 = ___ ___ 99 = ___ ___ 60 = ___ ___
2 . :
56+15= 74+17= 39-10= 68-40= 29 + 40= 63 + 20 =
3. 25 46 . ?
4. 64 5 20.
5. 3, .
6. 5. 4. .
.