This file contains pages that demonstrate the meaning of the equal sign (as a balance) in accordance with CCSS 1.OA.7. These pages use ten frames, tally marks, base ten blocks and numerals to illustrate the use of the balance (showing both sides have the same value even if they look different). Several more pages use true/false equations with the balance visual. There is also a blank balance page in which the students can create their own true/false equations to test a classmate.
CCSS.Math.Content.1.OA.D.7 Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 – 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2.
CCSS.Math.Content.1.OA.B.4 Understand subtraction as an unknown-addend problem. For example, subtract 10 – 8 by finding the number that makes 10 when added to 8.