Scrie inmultirile sub forma unor adunari repetate,apoi calculeaza: a)3x230=............+............+............=............ b)4x140=............+............+............+............=............ c)2x450=............+...........=............ d) 5x123=............+............+............+............+............=............
a) 3x230=230+230+230=460+230=690 b) 4x140=140+140+140+140=280+140+140=420+140=560 c) 2x450=450+450=900 d) 5x123=123+123+123+123+123=246+123+123+123=369+123+123=492+123=615
