Răspuns :
Răspuns:
9×(18+21)=
9×18+9×21
162+189=351
12×(56-34-2)
12×56-12×34-12×2
672-408-24=240
Răspuns:
18x9x9x21+9= 9(2x1x1x3+1)=9(6+1)=9x7=63
Răspuns:
9×(18+21)=
9×18+9×21
162+189=351
12×(56-34-2)
12×56-12×34-12×2
672-408-24=240
Răspuns:
18x9x9x21+9= 9(2x1x1x3+1)=9(6+1)=9x7=63