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Write an equation for an addition story

An addition story is represented by an equation that identifies the quantities being combined, the addition relationship, and the total, such as 36+24=6036+24=60 or 36+□=6036+\square=60. The learner interprets the equal sign as expressing equivalence, can represent an unknown total or addend with a symbol, and works with whole-number situations within 1,000; formal variables, negative numbers, fractions, and generalized algebraic equations are outside this scope.

Detailed Explanation: Write an equation for an addition story

An addition story tells about two amounts being put together.

To write an equation:

  1. Find the first amount.
  2. Find the amount being added.
  3. Use a plus sign, ++, to show the amounts are combined.
  4. Write the total after the equal sign, ==.

Example:

Lena has (27)(27) red apples. She gets (15)(15) green apples. How many apples does she have altogether?

  • First amount: (27)(27)
  • Amount added: (15)(15)
  • Total: (27+15=42)(27+15=42)

So the equation is

27+15=4227+15=42

This means that (27)(27) apples and (15)(15) apples combined are equal to (42)(42) apples.

Learn by doing: Write an equation for an addition story

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    Algebraic Equation from Sentence - Addition and Subtraction

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