The final answer is not finished until accuracy, units, bounds and context are checked.
Students can understand the method and still lose marks because of rounding, units, bounds or final answer format.
This page trains students to protect marks after the main calculation is done.
Goal: students should know when to round, how to use decimal places and significant figures, how to convert units, how bounds work, and when context forces rounding up or down.
| No. | Question | Skill tested |
|---|---|---|
| 1 | Round 7.836 to 2 d.p. |
Decimal places |
| 2 | Round 0.009472 to 2 s.f. |
Significant figures |
| 3 | Estimate 41.2 × 19.6 |
Estimation |
| 4 | Find bounds for 12 cm measured to nearest cm |
Bounds |
| 5 | Find bounds for 8.7 kg measured to nearest 0.1 kg |
Decimal bounds |
| 6 | Convert 4.2 m to cm |
Length units |
| 7 | Convert 3 m² to cm² |
Area units |
| 8 | Convert 0.5 km to m |
Metric conversion |
| 9 | A box holds 24 cans. How many boxes are needed for 250 cans? | Context rounding |
| 10 | Give RM7.856 to 2 decimal places | Money rounding |
| Score | Meaning | Action |
|---|---|---|
| 0–4 | Accuracy habits are unsafe | Start from Method System |
| 5–7 | Basic rounding okay, but bounds/units/context weak | Study traps and Level 2 drill |
| 8–9 | Mostly safe | Do Paper 4 mixed questions |
| 10 | Strong | Move to full Number mixed practice |
| Clue in question | Skill needed |
|---|---|
| “to 2 decimal places” | Decimal places |
| “to 3 significant figures” | Significant figures |
| “estimate” | Round first, calculate approximately |
| “nearest cm / kg / metre” | Bounds |
| “upper bound / lower bound” | Limits of accuracy |
| “units” | Convert carefully |
m², cm², m³, cm³ |
Area/volume conversion |
| Money answer | Usually 2 decimal places |
| People, buses, boxes, tins | Context rounding |
| Long calculator decimal | Round at the end only |