# Home 27 · Catch a silly total

**Try one tiny turn.**

Prepare: MODEL batches 163 and 248; reported total 41.

Invitation: Ask whether 41 could be sensible before calculating; then find a useful exact total and check one part.

Adult worked model/check: 163 + 248 = 411; roughly 200 + 200 = 400. 41 loses the hundreds;411 − 248 = 163.

Choice and boundary: Usual communication or exact scribing; no calculator needed, no timed contest.

Usual communication, exact scribing, private/untimed work and stopping are welcome. Keep a model answer separate from your child's own attempt; do not correct it silently. Observe one useful reason and choose a new unrelated example if wanted.

[Pick another home turn](../parent-start.md)