The lengths of three rods are 6cm, 9cm, and 11cm. How can you see those rods to measure a length of 14cm? Show the process.
You want to get a measurement of 14 cm.
Take the 9 cm rod and the 11 cm rod and stack them up, or add them together.
Then, subtract the 6cm rod.
9cm + 11cm - 6cm = 14cm
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