Răspuns:
7x23+7x27=161+189=350
sau
7x(23+27)=7x50=350
9x128-9x38=1152-342=810
9x(128-38)=9x90=810
3x21x0x9x4=0
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Răspuns:
7x23+7x27=161+189=350
sau
7x(23+27)=7x50=350
9x128-9x38=1152-342=810
sau
9x(128-38)=9x90=810
3x21x0x9x4=0