Adding g to kg, mL to L

Introduced in the Year 6 curriculum as: "Use, read, write and convert between standard units, converting measurements of length, mass, volume and time from a smaller unit of measure to a larger unit, and vice versa, using decimal notation to up to three decimal places"

We can't add two amounts unless we convert them to the same unit - both in ml or both in L {black

Example 1:

Example 2:

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