Răspuns:
a)=5×13=75
b)=8×6=48
c)10×2=20
d)7×9=49
f)=15×15= 225
5x9-5x4=45-20=25 5x5=25
8x2+8x4=16+32=48 8x6=48
10x7-10x5=70-50=20 10x2=20
3x9+4x9=27+36=63 7x9=63
15x10-15x5=150-75=75 15x5=75
Explicație pas cu pas:
