Skill: Recognize equality

Explanation and Free Practice Resources

Equality means that two quantities or expressions have the same value, represented by the equals sign, regardless of which expression appears first. With whole numbers through 100 and addition or subtraction expressions, this understanding includes interpreting and judging number sentences such as 8+4=128+4=12 and 15=9+615=9+6, rather than treating “=” as a signal that an answer follows; formal algebraic manipulation with variables, fractions, or decimals is not included.

Detailed Explanation: Recognize equality

The equals sign == means “has the same value as.” It does not always mean that the answer comes after it.

To check a number sentence, find the value on each side of the equals sign and compare them.

Example: Is (15=9+6)(15=9+6) true?

  1. Look at the left side: (15)(15).
  2. Add on the right side: (9+6=15)(9+6=15).
  3. Compare the two values: (15)(15) and (15)(15) are the same.

So the number sentence is true:

15=9+615=9+6

The order does not matter. It also means the same thing as (9+6=15)(9+6=15).

Learn by doing: Recognize equality

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Addition - Balance Equation - One Digit, Two Terms


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