🎓 Deeper Dive — Adults

Number sense is intuitive fluency: knowing 0.4 = 40% = 2/5 instantly, recognising powers of 2 (2, 4, 8, 16, 32 …), spotting that 7 × 8 = 56 and 8 × 7 = 56 (commutative).

Place value: in 4327, the 3 represents 300, not 3. Decimal system uses base 10 — 0.5 is "half" because 5/10.

Estimation discipline: in CAT and Bank PO exams, fast estimation eliminates wrong options before exact calculation.