Calculeaza a×18×34,stind ca a×5=25
Calculeaza b×9×25,stiind ca b:4=12


Răspuns :

a x18x34=?
ax5=25, a=25:5, a=5
5x18x34=90x34=3060

bx9x25=?
b:4=12, b=4x12, b=48
48x9x25=432x25=10800

ax18x34     ax5=25
a=25:5
a=5
5x18x34=90x34=190

cx9x25      c:4=12
c=12x4
c=48
48x9x25=432x25=10800

am pus c deoarece nu imi merge tasta