369. Calculează rapid.

Răspuns:
La a) 100:10=10. 40:10=4 400:10=40 100:100=1
b) 30x10:100=3 3x100:10=30 100:10x10=100 10x10:100 =1
c) 30x40:10=120 5x30:10=15 4x50:100=2 60x100:1=6000