Measures and accuracy common mistakes

Common mistakes

• Standard units and compound measures common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Use standard units of mass, length, time, money and other measures, including compound measures, with decimal quantities where appropriate..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Standard units and compound measures.

• Standard units and compound measures common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Use metric conversion factors for length, area, volume and capacity when required..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Standard units and compound measures.

• Estimation and checking common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Estimate answers and check calculations using approximation and estimation, including answers obtained using technology..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Estimation and checking.

• Rounding and simple error intervals common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Round numbers and measures to an appropriate degree of accuracy..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Rounding and simple error intervals.

• Rounding and simple error intervals common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Use inequality notation to specify simple error intervals caused by truncation or rounding..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Rounding and simple error intervals.

• Limits of accuracy and bounds common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Higher only] Apply and interpret limits of accuracy, including upper and lower bounds..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Limits of accuracy and bounds.