Estimate and check · e-first · own response — complete no-image alternativeYear 3 Maths · T1 W5–6 · Source text / Aids / E first own alternative

MODEL collection: 5 complete groups of 20 pieces and 8 loose pieces. Two fictional material batches are 317 and 268 pieces. Stock is 600 pieces. A ticket reports the combined batches as 58 pieces. No real class count, purchase or event is asserted.

Choose usual communication, exact scribing, private/untimed response, rest or pause. No physical action is inferred. A blank paper or typed page can replace this aid; keep each prompt separate.

1. Estimate the collection using a known group. Explain your clue; keep an estimate different from an exact count.

Own response: [genuinely empty; no worked answer]

2. Before exact addition, give a useful estimate of the two batches and explain a benchmark.

Own response: [genuinely empty; no worked answer]

3. Calculate the exact combined batches. Is stock enough, and what is left?

Own response: [genuinely empty; no worked answer]

4. Explain why 58 needs checking. Use a connected inverse check for your own exact total.

Own response: [genuinely empty; no worked answer]

The image carries the complete supplied source and all four prompts above. The access options and geometry explanation are provided here in words. Each response rectangle is 180×27 viewBox units; its interior contains no marks or answers. The page is 210×297 mm; a viewBox unit is not a certified measured real object. Original aid/alternative CC BY 4.0.