*NEW* M 23 – MASS IN INFORMAL UNITS ON AN EQUAL ARM BALANCE
Children compare masses on an equal arm balance, using uniform informal units.
They relate number of units to the mass of the object.
They relate number of units to the mass of units.
Children compare masses on an equal arm balance, using uniform informal units.
They relate number of units to the mass of the object.
They relate number of units to the mass of units.