4.NBT.A.2 Grade 4 · Number and Operations in Base TenRead and write multi-digit whole numbers using base-ten numerals, number names, and expanded form.Common Core State Standards for Mathematics, as adopted in the Massachusetts Curriculum Framework for Mathematics (2017), Grade 4.
Play the game: Ten Times Biggerfree, 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.
4.NBT.A.1A digit is worth ten times as much one place to the left4.NBT.A.3Round whole numbers to any place4.NBT.B.4Add and subtract multi-digit numbers fluently with the standard algorithm4.NBT.B.5Multiply up to four digits by one digit and two digits by two digits, explained with arrays and area4.NBT.B.6Divide up to four digits by one digit, with remaindersColorMyMath · 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.