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Kindergarten Operations and Algebraic Thinking

 

What Your Child Will Learn

Represent addition and subtraction in many ways. (K.OA.1)
 
Quarter 3 and 4
 
Solve addition and subtraction word problems within 10 (K.OA.2)
 
Quarter 3 and 4
 
Break apart numbers into pairs in more than one way (e.g., 5 = 2 + 3, 5 = 4 + 1, and 5 = 5 + 0). (K.OA.3)
 
Quarter 3 and 4
 
Find the number that makes 10 when added to a given number. (e.g., If you have 6 what number is needed to make 10?) (K.OA.4)
 
Quarter 3 and 4
 
Fluently add and subtract within 5. (K.OA.5)
 
Quarter 3 and 4
 

Vocabulary

  • Add: To join together two or more numbers
  • Subtract: To take one quantity away from another
  • Equation: A mathematical statement containing an equal sign, to show that two expressions are equal
  • Decompose: To break a number into smaller parts to simplify computation. Example: 15 = 10 + 5.
  • Equal Sign: Having the same amount or value
  • Compose: To put decomposed numbers back together. 10 + 5 = 15

Activities at Home

  • Use cereal pieces to solve the following problem: Mason has 10 pieces of cereal. He eats 4 pieces. How many pieces are left?
  • How old are you now? Subtract one from that number and record it. Add 3 to that number and record it.
  • Count backwards from 100. Skip count to 100 by 10s. Which took longer? Write your answer.
  • Go outside and find two clovers. Write an equation to show how many leaves are on both clovers.
  • Use some fruit to solve the following problem: Ken has 5 bananas in a bunch. He eats some. There are 3 left. How many bananas did he eat?
  • Ben had 4 chairs at his kitchen table in the morning. After school there was only 1 chair at the kitchen table. How many chairs are missing?

Learning Links


 
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Ten Frames

 
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Grouping in 5's and 10's

 
 
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Adding on a Number Line

 
 
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Equivalent Numbers

 
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Adding and Subtracting

 
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Subtraction

 
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Simple addition

 
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Addition

Kindergarten Common Core

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