1.OA.D.7 Grade 1 · Operations and Algebraic ThinkingUnderstand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false.Common Core State Standards for Mathematics, as adopted in the Massachusetts Curriculum Framework for Mathematics (2017), Grade 1.
Play the game: Every Way to Make 10Step 8 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 8Proving the making of 10Step 31Proving the doubles — Buddy? Mark the ten downStep 44Proving: 9+3=12, 9+2=11Step 45Proving: 6+5=11, 7+6=13, 8+7=15, 9+8=17Step 46Proving: 7+5=12, 8+6=14, 9+7=16Step 47Proving: 7+4=11, 8+5=13, 9+6=15Step 48Proving: 8+4=12, 9+5=14, 8+3=11, 9+4=131.OA.A.1Word problems within 20: adding to, taking from, putting together, comparing, with the unknown anywhere1.OA.A.2Word problems with three numbers that add to 20 or less1.OA.B.3Use properties of operations to add (3 + 8 = 8 + 3; 2 + 6 + 4 = 2 + 10)1.OA.B.4Subtraction is an unknown-addend problem (10 - 8: what goes with 8 to make 10?)1.OA.C.5Relate counting to adding and subtracting (count on 2 to add 2)1.OA.C.6Add and subtract within 20: counting on, making ten, breaking down to a ten, doubles; fluent within 101.OA.D.8Find the unknown number in an equation (8 + ? = 11)ColorMyMath · 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.