Relating Addition and Subtraction Worksheets
Addition and subtraction are the foundational operation of math.One is the concept of getting more, the other is taking something away or having less.They are the direct opposite of one another. If I gave 5 ice pops and then you gave those same 5 ice pops to Jennifer, you did not gain or lose anything. At first when we learn basic adding we tell students to count up from the starting number. When we introduce subtraction, we conversely ask them to count down from the starting value.Students are often more challenged with subtraction. I find that it is often because the concept of losing something or taking away has a negative connotation of sorts.If you present this concept as reverse addition, it will normally work out better because you took the negative thoughts away from the concept. The worksheets and lessons that are found below will help make the concept of the relationship between these operations crystal clear to students.I find this a good topic to work on once students have their basic math facts down.
Aligned Standard: Grade 2 Base Ten - 2.NBT.9
- Step-by-step Lesson- Explore math fact families for the first time. Look at the different properties of operations.
- Fact Families 5 Pack- Who does and does not belong to these fact families?
- Guided Lesson - This consists of three parts. Write a missing fact family and find related fact families.
- Guided Lesson Explanation - We look at how fact families are related and how to determine all four family members.
- Practice Worksheet - You are asked to write a related fact family for each of the equations.
- Matching Worksheet - Match the related fact families.
- Answer Keys - These are for all the unlocked materials above.
One sheet focuses on addition, another on subtraction, and then we combine them in the third sheet.
- Homework 1- Write a related addition fact for the fact family.
- Homework 2- Related subtraction facts use the same numbers and difference. To find the related subtraction fact, swap the numbers after the minus sign and equals sign.
- Homework 3- What fact is missing from this fact family?
Make sure to read slowly. Some times kids now the skill, but get it wrong because they rush.
- Practice 1- What addition facts are missing?
- Practice 2- Write a related subtraction fact for the fact family.
- Practice 3- Find the final value of the following problem.
Math Skill Quizzes
We give you a nice mix of all the different skills we reviewed here.
- Quiz 1- Pick the fact that does NOT belong in the family of 8.
- Quiz 2 - This quiz covers all the major aspects of the skill that we have explored together.
- Quiz 3 - Take your time with these problems and read the directions carefully.
The Concept of Math Fact Families
When studying number relationships, the fact family is a key concept. The concept of fact family is a technique that helps a child develop a strong understanding of basic addition and subtraction.
A group of three numbers where each of the members are related to each other through addition or subtraction is known as the fact family. These three numbers make up at least four math facts.
To understand the fact, families let's take the examples of the following three numbers: 4, 6, and 10.
When you add 4 and 6, you get a 10. You can apply commutative property here and get the same answer;
4 + 6 = 10 and 6 + 4 = 10
The addition here is the direct relationship between these numbers. Subtracting 4 from 10 will give you a 6, and subtracting 6 from 10 will give you a four.
10 - 4 = 6 and 10 - 6 = 4
Subtraction here is the family cousin that fulfills the inverse property. When a child begins to grasp the concept of fact families, addition and subtraction between simple digit become simple and easy. Students can use the found above worksheets and lessons to learn the ins and outs of math fact families.