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1st grade math · Unit 6: Length

Compare with a third thing

What this lesson shows

The rope is longer than the bench. The bench is longer than the table. So the rope is longer than the table.

The worked example

The lesson works this one step by step: 10, 6, 3. Then your kid tries one like it on paper.

The steps

  1. Compare the first two
  2. Compare the last two
  3. So the first beats the last

Helping at home

Compare each with the thing in the middle. If the first is longer than the middle one, and the middle one is longer than the last, the first is longer than the last.

If your kid gets stuck

Compare each with the middle one.

Watch it with Lux

With Lux, this lesson is a narrated video and a printed page your kid works on. Then Lux helps with the same math on their own worksheet, one question at a time.

See how Lux works

Standards

  • Common Core 1.MD.A.1
    Order three objects by length; compare the lengths of two objects indirectly by using a third object.
Matches standards in 48 statesSee each state's code

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