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Common Core Standards

10 More and Less

Grade: 1st Grade
Standard:

1.NBT.C.5

Description:

Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.

Standard:

1.5.C

Description:

use relationships to determine the number that is 10 more and 10 less than a given number up to 120;

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