calculeaza:3×27=3×(..........+.....)=.....×..........+......×........…..=..........calculeaza:4×39=4×(...........+.....)=....×...........+....×...........=.............

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30 Agustus 2025 matematica 5 minute
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calculeaza:3×27=3×(..........+.....)=.....×..........+......×........…..=..........calculeaza:4×39=4×(...........+.....)=....×...........+....×...........=.............
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3×27=3×(20+7)=3×20+3×7=60+21=81
4×39=4×(30+9)=4·30+4×9=120+36=156
Răspunsul a fost dat în data 30 Agustus 2025

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