Real numbers
Number systems · Mathematics
Study notes
Q: Classify each: 5, −3.5, 0, 2/7, √9, π. Step 1: 5 → natural, whole, integer, rational, real. Step 2: −3.5 → rational, real (not integer). Step 3: 0 → whole, integer, rational, real. Step 4: 2/7 → rational, real. Step 5: √9 = 3 → natural, whole, integer, rational, real. Step 6: π → irrational, real only.