Answer :
Final answer:
To find the length of the other piece of ribbon, subtract the length of the first piece from the total length. The length of the other piece of ribbon is 1 m 70 cm.
Explanation:
To find the length of the other piece of ribbon, we need to subtract the length of the first piece from the total length.
Given that Sara joined a piece of ribbon to make it 2 m 40 cm, and the original ribbon was 70 cm long,
the length of the other piece of ribbon is 2 m 40 cm - 70 cm = 2 m 40 cm - 0.7 m = 1 m 70 cm.
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