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2.MD.6 – Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points corresponding to the numbers 0, 1, 2, ..., and represent whole-number sums and differences within 100 on a number line diagram.
Samples: Representing whole numbers as lengths on a number line. Adding and subtracting unit lengths using blocks.
You can go to an overview of all the curricula here.
3.GM.1 – Measure the lengths, areas, volumes or capacities, and weights of objects and the duration of events, using linear whole-number scales and applying basic addition facts to standard units
Samples: Telling the time on an analog clock - quarter to and past. Months of the Year. Reading a Calendar.
KS2.Y3.M – Measurement
Pupils should be taught to:
KS2.Y3.M.1 – Measure, compare, add and subtract: lengths (m/cm/mm); mass (kg/g); volume/capacity (l/ml)
Samples: Adding and subtracting unit lengths using blocks. Units Of Measure Metric. Measuring mass using the kilogram (kg).