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Lesson Plan
Curated OER

Bears in a Box

For Teachers 1st
First graders count bears to predict missing addends. They analyze the missing addend sentence: 7 + ? = 10 and count up from 7 to 10 and check to see if there are 3 bears in the box.
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Lesson Plan
Curated OER

Domain: Operations and Algebraic Thinking

For Teachers K - 2nd
Practice basic operations for young mathematicians in fun ways! Using two decks of cards (Ace through 10 plus the joker), learners play "memory" by matching numbers that can be added to make 10 and writing number sentences. In another...
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Worksheet
Curated OER

Review of Addition Facts

For Students 1st
In this addition worksheet, 1st graders write down the addends that make up 5 and 6. They match addition problems to the sums 5 and 6, and find the missing addends in 10 problems. They compare equations to 5 and 6 using the symbols for...
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Lesson Plan
Curated OER

Math Lesson Plan : Finger Counting

For Teachers 1st - 2nd
Create a class of mathematics master. They practice addition to ten until they have mastered the skill. They use their hands to add numbers and eventually find the missing addend to make a sum of 10. They also subtract a single digit...
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Worksheet
Curated OER

Number Breakdown and Description Worksheet

For Students 1st - 2nd
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...
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Worksheet
Curated OER

Add and Subtract within 1000

For Students 2nd - 3rd
There are some missing parts in these addition and subtraction problems. Scholars start by completing two number sentences, each involving all three-digit numbers. Then, they examine another number to determine the value of the tens...
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Worksheet
Curated OER

Unknown Numbers in Sums and Differences - Step-by-Step Lesson

For Students 1st
First grade mathematicians will love to monkey around with an illustrated word problem involving missing bananas. They must decide how many bananas the monkey ate by counting the remaining bananas and by counting the number Lee had and...
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Interactive
CK-12 Foundation

Decimal Addition: Adding Little Pieces

For Students 4th - 6th Standards
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...
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Worksheet
Curated OER

Missing addend - sums with 8 and 9

For Students 2nd
For this missing addend worksheet, 2nd graders are given the sums of 8 or 9 and they have to write the missing addends to the addition problem given to them represented by cubes. Students complete 16 problems.
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Worksheet
Curated OER

Missing addend - 2 through 10

For Students 1st - 2nd
In this missing addend worksheet, students fill in the missing addends to the problems where the answers are given. Students put numbers in place of cubes to create number sentences for 16 problems.
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Worksheet
Curated OER

Missing addend - 10 through 18

For Students 2nd - 3rd
In this missing addend worksheet, students fill in the blank for the missing addend in the number sentence for answers 10 through 18. Students fill in 32 numbers.
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Worksheet
Curated OER

Missing Addends

For Students 2nd - 3rd
In this missing addends worksheet, students figure out the missing addend to an addition problem based on the pictures given to them and solve the problem. Students solve 6 problems.
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Worksheet
Curated OER

Addition: missing addends

For Students 2nd - 3rd
For this missing addend worksheet, students complete the missing addend for an addition problem making both sides of the equal sign equal. Students complete 6 problems.
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Worksheet
Curated OER

Missing Addend - sums with 6 and 7

For Students 2nd
In this missing addend activity, 2nd graders complete the missing numbers to addition problems where sums are between 6 and 7 where the numbers are represented by cubes. Students complete 16 problems.
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Worksheet
Curated OER

Missing Addends-Sums With 6 and 7

For Students 1st - 2nd
In this missing addend worksheet, students fill in missing numbers above pictures of blocks. Each problem has a sum of either 6 or 7. A reference web site is given for additional activities.
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Worksheet
Curated OER

Missing Addend

For Students 2nd
In this addition worksheet, 2nd graders find the missing addends. Students complete 32 problems filling in the missing digit for each.
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Worksheet
Curated OER

Missing Addend With Sums of Ten

For Students 2nd - 3rd
For this addition worksheet, students find the missing addends which add up to ten. Students complete 32 problems filling in the missing digit for each.
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Worksheet
Curated OER

Missing Addend - 2 Through 5

For Students K - 1st
In this addition skills worksheet, students solve 16 addition problems that require them to identify missing addends using the provided math counters.
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Worksheet
Curated OER

Missing Addend Sums With 8 and 9

For Students 2nd - 3rd
In this addition worksheet, students complete problems with sums of eight and nie.  students solve 12 problems, solving for the missing addend in each.
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Worksheet
Curated OER

Missing Addends

For Students 1st - 2nd
In this addition practice worksheet, students solve 32 problems that require them to fill in the blanks in the addition trees with the appropriate missing addends.
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Worksheet
Curated OER

Missing Addend -2 Through 10

For Students 1st - 2nd
In this addition practice worksheet, students solve 28 problems that require them to identify the missing addends in the problems.
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Worksheet
Curated OER

Missing addends

For Students 2nd - 3rd
In this addition worksheet, students complete number sentences with their missing addends with numbers less than 15. Students complete 10 multiple choice questions.
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Worksheet
Curated OER

Addition - What Are the Missing Numbers?

For Students 3rd - 4th
In this addition worksheet, students determine what the missing numbers are in 8 two digit addition problems; either finding the sum or an addend. They estimate and calculate each answer in 4 three and four digit addition problems.
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Worksheet
Curated OER

Missing Addend - 2 through 5

For Students 2nd
In this missing numbers worksheet, 2nd graders fill in the missing numbers in the correct place value spot according to the blocks given. Students complete 16 problems.

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