Video: Finding One Less Than a Known Double as a Strategy to Add

Use 7 + 7 = 14 to find 7 + 6

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Video Transcript

Use seven plus seven equals 14 to find seven plus six.

We know that seven plus seven is 14 and seven plus six is one less than seven plus seven. 13 is one less than 14.

So seven plus six equals 13.

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