Maryland Math 1.NOS.A.2

Math1st GradeNumber and Operation Sense

The Standard

Read, write numerals, and represent a number of objects with a written numeral within 120.

Maryland College and Career Ready Standards for Mathematics (2025) · EXTEND THE COUNT SEQUENCE.

Teacher's field guide

What Students Need to Do: Students read and write numerals up to 120. They count up to 120 objects and write the numeral that tells how many there are.
What Mastery Looks Like: A student can read 106 aloud and write it when they hear “one hundred six.” They can count a collection of 106 objects and write 106 without skipping or counting any object twice.
Common Misconceptions: Students may write 106 as 1006 or read 104 as 14. When counting a large collection, they may skip objects or count one twice.
How to Assess It: Show 10 groups of 10 dots and 7 single dots. Ask each student to count them, write the total, and read their numeral aloud.

Lesson moves

Have pairs make 10 groups of 10 linking cubes, add 3 single cubes, and write the total on a card.
Show 109 and 19, then ask partners which numeral matches 10 groups of ten and 9 single objects.
Play numeral bingo with cards from 1 to 120, calling numbers aloud for students to find and cover.
Count paper clips into a classroom supply cup, then write the total on a label for the cup.

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