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## Addition Scale

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# Addition Scale

Select a number and drag it to the scale to balance the equation and the scale.

### Common Core

Grade 1 » Operations & Algebraic Thinking

CCSS.MATH.CONTENT.1.OA.D.7

*Work with addition and subtraction equations.:* 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.