Curated OER
Missing Number
First graders examine how to use a symbol and shape variable to represent a missing value in a mathematical equation. They listen to the book "Fish Eyes" and "One Less Fish," and observe the teacher write an equation represented for each...
Curated OER
Addition Properties
Addition becomes much simpler once scholars understand its properties. They examine the commutative property through five equation pairs. For each, the addends have been switched and scholars must fill one in. The next six problems give...
Math Salamanders Ltd.
Division to 10 x 10 Sheet 3
Learners fill in the missing addends to the one and two-digit number division problems. They complete 40 problems. A classic worksheet!
Curated OER
Missing Addend Addition Using Math Counters
In this missing addend addition activity, students fill in the missing addend in 6 problems. Math counting blocks are provided to solve the 1-digit problems.
Curated OER
Missing Addends-2 Through 10
In this missing addend worksheet, learners fill in the missing addend needed to arrive at a given sum, using numbers 2 through 10.
Curated OER
Missing Addend (2 through 5)
In this addition learning exercise, students find the missing addend in each problem. Students have thirty-two problems where they are to find the missing number that correctly completes the addition problem.
Curated OER
Addition: Missing Addends
In this addition practice learning exercise, students solve 32 problems that require them to identify the missing addends in the addition trees.
Curated OER
Missing Addend (10-18)
In this addition worksheet, students practice their addition skills. Students complete the worksheet by finding the missing addend.
Curated OER
Power Up! Addition
In this power up addition worksheet, 2nd graders use the numbers from 2 to 12 to fill in the missing addends for 10 addition problems.
Curated OER
Number Breakdown and Description Worksheet
How many ones and how many tens? Explore place value and addition. Learners begin by solving two missing addend problems followed by an addition and subtraction equation. Then, they read two sentences describing numbers by their place...
Curated OER
Inverse
Your class can learn all about inverse operations. They will review what inverse operations are, see examples, learn how to use inverse operation to check an answer, write addition and subtraction equations in the inverse, and use the...
Curated OER
Math Review Questions
In this problem solving worksheet, students calculate and solve 52 questions or equations having to do with a variety of math concepts and strategies.
Curated OER
Find the Missing Addend
In this find the missing addend worksheet, 1st graders solve the equation by filling in the missing addend for 10 equations with addends from 0-9.
Curated OER
Addition: Fill in the Missing Addend
For this addition worksheet, students fill in a missing addend to arrive at a given sum, 7 problems total. A reference web site is given for additional activities.
Curated OER
Ones and Tens Place Value
As scholars examine place value, these exercises help them incorporate addition and grouping. First, they answer three missing-addend questions, each with 10 as the given addend. Because all of the missing numbers are single-digit, this...
Curated OER
Subtraction and Unknown Addends (to 20) - Matching Worksheet
Piggies, puppies, dragons and other fantastical illustrations enable first graders to find the missing addends in a series of subtraction problems. After determining the unknown addend, pupils match the equations to the appropriate...
Curated OER
One and Tens Place Value
Counting is much easier when the objects are arranged in groups of 10! This place-value practice sheet helps young mathematicians grasp ones and tens place value through three exercises. First, they complete three missing addend...
Curated OER
Make Ten Guided Lesson
Use these missing-addend problems to help your beginning mathematicians practice addition facts. They read sentences and solve, making 10 from different single-digit numbers. Each of these four problems is formatted differently, so the...
Curated OER
Add and Subtract within 20
Here is a more interesting way to practice addition and subtraction number sentences. Learners complete two sum boxes, adding across and down then totaling for a final sum. They do the same with subtraction in two more boxes. Finally,...
Curated OER
Missing Tens
Foster mental math skills with this worksheet; combine with 10-rods to modify. Twenty problems provide plenty of practice to master subracting by tens. Missing addends promote algebraic thinking.
Curated OER
What's Missing?
Add a challenge for your young mathematicians' adventures in double-digit addition. Instead of simply computing sums in the 9 problems, they work backwards to fill in blanks among the addends. Resource makes a terrific extension or...
CK-12 Foundation
Decimal Addition: Adding Little Pieces
A five-question interactive test scholars' knowledge of adding and subtracting decimals. A tool aids in problem-solving with movable parts that reveal addends and sums. Question types include one discussion, fill and in the blank, and...
Curated OER
Add or Subtract (up to 50)
Do you add or subtract? It's up to your mathematicians as they fill in the symbol for 16 equations to make them true. The numbers in this section don't exceed 18. Next, learners answer six word problems by determining the missing addend...
Curated OER
Subtraction and Unknown Addends
The missing addend strategy is helpful to young mathematicians approaching subtraction. This worksheet walks learners through the required steps, solving the problems with them. They examine situations with one addend and a sum provided,...