3.OA.D.9 Grade 3 · Operations and Algebraic ThinkingIdentify arithmetic patterns (including patterns in the addition table or multiplication table) and explain them using properties of operations.Common Core State Standards for Mathematics, as adopted in the Massachusetts Curriculum Framework for Mathematics (2017), Grade 3.
Play the game: Factors and Patternsfree, no sign-up →Addition is a length — dots laid end to end on the number line. Taking away comes down the same line. Every fact is shown as a picture before it is ever asked for from memory.
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.
3.OA.A.1Multiplication as equal groups (5 x 7 is 5 groups of 7)3.OA.A.2Division as sharing out equally3.OA.A.3Multiplication and division word problems within 100: equal groups and arrays3.OA.A.4Find the unknown number in a multiplication or division equation (8 x ? = 48)3.OA.B.5Properties of multiplication: turn it round, regroup it, split it (distributive)3.OA.B.6Division is an unknown-factor problem3.OA.C.7Multiply and divide within 100 fluently; know all products of two one-digit numbers3.OA.D.8Two-step word problems with all four operationsColorMyMath · 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.