Standard Alignments:

TEKS Math: 1.5.C

(C) Use relationships to determine the number that is 10 more and 10 less than a given number up to 120

AU Math: ACMNA012

(Y1) Develop confidence with number sequences to and from 100 by ones from any starting point. Skip count by twos, fives and tens starting from zero (ACMNA012)

CCSS Math: 1.NBT.5

1.NBT.5 Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.