In Maths, we are looking at measurement, beginning with measuring in metres and centimetres. We started by working out what the intervals must mean on different rulers and came to realise that there are 100 centimetres in a metre and 10 millimetres in a centimetre. We also used our knowledge of number to work out that if the measurement is between two intervals, the measurement must be halfway between them (for example between 1 metre and 30 centimetres and 1 metre and 40 centimetres will be approximately 1 metre and 35 centimetres)
Once we were confident reading the scales on rulers, we got to measure each others arm span – the length of both arms outstretched – but we came up with a problem when we realised most of our arm spans were greater than the 1 metre sticks we were using. We could solve that problem by positioning our finger at the end of the metre stick and continuing the measurement from our finger.
After measuring each others arm spans, we worked out the measurements of our desks and saw whose measurements were the most accurate – this meant measuring the height, the width and the length. Now that we have learned how to measure in metres and centimetres, we will be doing the same with centimetres and millimetres, finding equivalent lengths and comparing lengths in different units of measurement.
