BrainGrain
✏️❓
CTET · TNTET — Maths Pedagogy
A child writes 21
instead of 12 🤔
Careless? Bad at maths? Examiners want the real reason 👇
It's not carelessness
Swapping the digits flips the whole value. That's a place-value gap, not a slip.
Why it matters
12 = 1 ten + 2 ones = twelve
21 = 2 tens + 1 one = twenty-one
🧱 Fix with manipulatives & error analysis — never label "can't do maths"
📌 A CTET, TNTET, DSSSB & Super TET favourite
Quick check 🤔 comment your answer
A child keeps writing 21 instead of 12. This most likely shows:
A · Dyscalculia
B · A place-value / digit-reversal gap
C · Vision problems
D · Inability to learn maths
✅ B — a place-value gap, fixable with manipulatives
BrainGrain
Learn it. Then prove it.
One free CTET/TNTET question every morning — answer + explanation. Build a 21-day streak.
Start free → braingrain.in/daily
Free · No login · English + தமிழ்
tap → next · hold to pause