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Addition and Subtraction Within 20, 2nd Grade Facts & Worksheets

Children start to develop strategies for adding and subtracting whole numbers on the basis of their earlier exposure with smaller numbers.

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Addition and Subtraction Within 20 Worksheets
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Children start to develop strategies for adding and subtracting whole numbers on the basis of their earlier exposure with smaller numbers. After learning the properties of addition and subtraction, kids now understand the connections between counting and the operations.

See the fact file below for more information on the addition and subtraction within 20 or alternatively, you can download our 37-page Addition and Subtraction Within 20 worksheet pack to utilise within the classroom or home environment.

Key Facts & Information

ADDITION: A REVIEW

  • Review the basics of addition. The first thing to do to make children understand addition is to let them know about this important symbol.
  • “Plus” sign, or the addition sign. If you see this symbol, it means that you have to do addition, or add the numbers or objects before and after this sign. The answer to an addition equation is called the sum.

ADDITION: COUNTING THE OBJECTS

  • Kids get more motivated when they see colorful objects. To introduce addition to them, present objects as examples or visual representations.
  • Addition is like counting objects. Having prior knowledge about counting makes it easier for the kIds to understand addition.

ADDITION: OBJECTS TO NUMBERS

  • Once the kids understand the idea of counting objects to do addition, introduce them to the idea of adding numbers. First, let them write the objects as numbers.
  • Once identified, present the number line and start introducing how addition works via the number line.

ADDING NUMBERS

  • The kids should now have an understanding of adding objects by counting them and the idea of converting objects to numbers and then adding them. Now, start introducing the idea of adding numbers.
  • To help them understand this better, you can use objects (by introducing conversion of numbers to objects) or by using the number line.
  • Convert the numbers to simple objects and then go back to their previous understanding of addition by counting objects.

SUBTRACTION: A REVIEW

  • Review the basics of subtraction. The first thing to do to make children understand subtraction is to let them know about this important symbol.
  • “Minus” sign, or the subtraction sign. If you see this symbol, it means that you have to do subtraction, or subtract the numbers or objects before and after this sign. The answer to an addition equation is called the difference.

SUBTRACTION: COUNT WITH OBJECTS

  • Present a subtraction word problem and explain the problem with a drawing.
  • There are 16 bananas on the table. Marcel the monkey ate 11 bananas. How many bananas are left?
  • Draw 16 bananas on the board or on a sheet of paper. Ask your children to count the bananas and label each banana with a number.
  • As you explain that Marcel the monkey ate 11 bananas, cross out or erase 11 bananas, and then ask them how many bananas are left.
  • Explain the problem with objects. Show a monkey puppet and place 16 bananas on the table and ask your child to count the bananas. Hide 11 bananas from the table, explaining that Marcel the monkey already ate the bananas. Ask the kids to count the number of bananas left on the table.
  • When using objects, replace the items you use so students can learn that math rules are universal. For instance, work through a problem using bananas, then do it again with balls.
  • Write a number sentence. Discuss with your pupils that you can represent this word problem with a number sentence. Guide them through the process of translating the word problem into a number sentence.

SUBTRACTION: OBJECTS TO NUMBERS

  • Present your students with a subtraction problem.
  • Use a number line to solve the problem. Draw a number line that ranges from 0 to 10.
  • Write a number sentence. Discuss with your pupils that you can represent this word problem with a number sentence. Guide them through the process of translating the word problem into a number sentence.

TEACHING ADDITION AND SUBTRACTION WITH FACT FAMILIES

  • A fact family is a set of facts or mathematical problems, which use the same numbers. Three numbers make up a fact family. These numbers can be added or subtracted in different methods.
  • For instance, the numbers 7, 8, and 15 form a fact family, which can create two addition number sentences and two subtraction number sentences.
  • Present your students with a subtraction problem.
  • There are 18 apples. 3 apples fell from the tree. How many apples are left?
  • Use a fact family to solve the problem. Create two addition and two subtraction number sentences.

COMMON CORE ADDITION AND SUBTRACTION

  • Common Core presents subtraction as measuring the distance between two points. To let your kids visualize, draw a number line ranging from 0 to 10.
  • Common Core presents addition and subtraction as measuring the distance between two points. To let your kids visualize, draw a number line ranging from 0 to 20.

Addition and Subtraction Within 20 Worksheets

This is a fantastic bundle which includes everything you need to know about the addition and subtraction within 20 across 37 in-depth pages. These are ready-to-use Addition and Subtraction Within 20 worksheets that are perfect for teaching students to develop strategies for adding and subtracting whole numbers on the basis of their earlier exposure with smaller numbers. After learning the properties of addition and subtraction, kids now understand the connections between counting and the operations.

Complete List Of Included Worksheets

  • Lesson Plan
  • Addition and Subtraction Within 20
  • Add or Subtract?
  • Number Bonds
  • Frog Jump
  • Is There a Difference?
  • Missing Numbers
  • Subtract Then Add
  • Add Then Subtract
  • Solving Problems
  • Magic Square
  • Decode

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Use With Any Curriculum

These worksheets have been specifically designed for use with any international curriculum. You can use these worksheets as-is, or edit them using Google Slides to make them more specific to your own student ability levels and curriculum standards.

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