3.OA.C.7 Grade 3 · Operations and Algebraic ThinkingFluently multiply and divide within 100, using strategies such as the relationship between multiplication and division (e.g., knowing that 8 × 5 = 40, one knows 40 ÷ 5 = 8) or properties of operations.Common Core State Standards for Mathematics, as adopted in the Massachusetts Curriculum Framework for Mathematics (2017), Grade 3.
Play the game: Split the BlockStep 61 of the ColorMyMath curriculum · free, 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.
Step 61Multiplication III / Division II: Calculating Areas IIIStep 62Division IIIStep 63Squares 1 through 15Step 64Squares 1 through 20Step 77Division by 2, no remainderStep 78Division by 5, no remainder3.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.D.8Two-step word problems with all four operations3.OA.D.9Find and explain patterns in the addition and times tablesColorMyMath · 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.