Addition means putting numbers together to make a total. Subtraction means taking away from a number to see what is left. We can work with numbers up to 20 to build a strong foundation for math.
Think of addition as “putting together” and subtraction as “taking away.” Use numbers up to 20 to practice fluency.
Sometimes a number sentence has a missing part. We can use what we know about addition and subtraction facts to find the missing number and make the sentence true.
Use known facts and number pairs to help solve for the missing part. Check your work by trying the opposite operation.
We can use counters, cubes, or drawings to show addition and subtraction. This helps us see the numbers clearly and understand how they work together.
Draw simple pictures or use real objects to solve problems. This makes it easier to check your answers.
A number line is a useful tool for solving addition and subtraction problems. Move forward to add and move backward to subtract.
Always move to the right on the number line when adding and to the left when subtracting.
Fact families show how addition and subtraction sentences are related. They use the same three numbers in four different ways.
Learning fact families helps you remember both addition and subtraction facts quickly.
Addition and subtraction are part of daily activities when we count, share, compare, or find out how many are left.
Practice by adding and subtracting when you share snacks, count toys, or compare groups at home or school.