1.NBT.A.1 Grade 1 · Number and Operations in Base TenCount to 120, starting at any number less than 120.Common Core State Standards for Mathematics, as adopted in the Massachusetts Curriculum Framework for Mathematics (2017), Grade 1.
Play the game: Count On, Count BackStep 26 of the ColorMyMath curriculum · free, no sign-up →Past nine, color tells you which place a digit lives in. A ten is a triangle of ten dots; the number of triangles is the tens digit, so 34 is three triangles and four loose green dots.
Every page is free and open — nothing to install, no account, and it works on a phone or a classroom board. Every number has its own color: 1 red, 2 orange, 3 yellow, 4 green, 5 blue, 6 purple, 7 brown, 8 pink, 9 cyan, and a number is that many colored dots.
Step 26Adding 1: counting to 115Step 27Adding 1: counting to 1251.NBT.A.2The two digits of a two-digit number are tens and ones1.NBT.A.3Compare two-digit numbers with >, = and <1.NBT.C.4Add within 100 using place value; sometimes a ten is made1.NBT.C.5Find 10 more and 10 less than a two-digit number in your head1.NBT.C.6Subtract multiples of 10 from multiples of 10ColorMyMath · getridoftheteacher.com · every number has its own color, and a number is that many colored dots. Matching a game to a standard is a judgement call; the official text is at doe.mass.edu.