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Scrie immultirile sub forma unor adunari repetate apoi calculeaza: 3*230= 4*140. 2*450. 5*123=

Răspuns :

3×230=230+230+230=690
4×140=140+140+140+140=560
2×450=450+450=900
5×123=123+123+123+123+123=615