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Interactive
Curated OER

Missing Number Addition

For Students 1st - 3rd
In this addition learning exercise, students are given one addend and the answer to a total of 25 simple addition problems. Students fill in the missing addend. Worksheet is labeled as a sample from a subscription site.
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Worksheet
Curated OER

Completing the Next Hundred

For Students 3rd - 5th
In this hundreds worksheet, students fill in the missing addend and complete the hundred numbers at the end of the problems. Students complete 3 sets of problems.
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Worksheet
Curated OER

Equations by 1 through 10

For Students 2nd - 3rd
In this missing addend worksheet, students fill in the missing addend to the addition and subtraction problems. Students fill in the missing addends for numbers 1 through 10 for 100 problems.
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Worksheet
Curated OER

Multiplication to 5x5 sheet 3

For Students 3rd - 5th
In this multiplication worksheet, students fill in the missing addends to the multiplication problems up to 5x5. Students complete 40 problems.
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Worksheet
Curated OER

Division related facts 10s and 100s sheet 2

For Students 4th - 6th
In this division instructional activity, students fill in the missing addends that are multiples of either 10s or 100s to the problems. Students complete 40 problems.
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Worksheet
Curated OER

Addition Exercises

For Students 2nd
In this addition worksheet, 2nd graders fill in the missing addend to the addition problems to make both sides of the equal sign equal. Students complete 7 problems.
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Worksheet
Curated OER

Missing Numbers Addition [C]

For Students 2nd - 3rd
In this addition learning exercise, students fill in the missing addend in 24 simple addition problems, answers are included on page 2.
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Worksheet
Curated OER

Commutative Property of Addition

For Students 1st - 3rd
Here are 10 simple addition problems intended to provide practice for those learning the commutative property of addition. Each question asks learners to fill in the missing addend that makes each equation true. An answer key is provided.
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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

It All Adds Up Puzzle #29

For Students 3rd - 4th
In this addition puzzle worksheet, students complete a 12 space grid in which rows and columns add up to be the numbers given. Students fill in the missing addends.
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Worksheet
Curated OER

It All Adds Up Puzzle #27

For Students 3rd - 4th
In this addition puzzle worksheet, students complete a 12 space addition square in which all rows and columns add up to equal the numbers given. Students fill in the missing addends.
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Worksheet
Curated OER

Add and Subtract Two-Digit Numbers

For Students 2nd
Learners complete two double-digit problems, one addition and the other subtraction. They also determine the missing addend in two additional problems. An explanation as to how to solve both problems is included. 
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Worksheet
Curated OER

Missing Addends

For Students 1st - 2nd
In this missing addends worksheet, students fill in one missing addend in a problem to arrive at the sum of 20, 5 problems total. An answer key is included.
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Worksheet
Curated OER

Same and Different

For Students 1st - 2nd
For this mathematics worksheet, students first complete the tens place and then add the rest. Then they continue the patterns and compare each column. Students also fill in the missing addends and solve various word problems by writing a...
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Worksheet
Curated OER

Addition: Missing Numbers with 3 Addends

For Students 1st - 2nd
In this 3 addend addition practice worksheet, students use their problem solving skills to solve 20 problems that require them to fill in the missing numbers in the problems.
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Interactive
Curated OER

Complete the number sentences

For Students 2nd
In this number sentences learning exercise, 2nd graders fill in the blank for the missing addend in the number sentence. Students complete 1 number sentence with 1 digit numbers.
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Worksheet
Curated OER

Missing Addends: Sums With 8 and 9

For Students 2nd - 3rd
In this missing addends activity, students fill in missing factors in addition problems. All problems have sums of 8 or 9. A reference web site is given for additional activities.
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Worksheet
Curated OER

Complete the Number Sentences

For Students 3rd - 4th
In this addition worksheet, students use three digit addition and solve for missing addends. Students master 15 problems filling in the missing numerals for each.
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Worksheet
Curated OER

Mystery Boxes

For Students 1st - 3rd
In this math learning exercise, students solve the problems that use the operation of addition. They fill in the missing addends or sums as needed.
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Worksheet
Curated OER

Addition Practice

For Students 3rd - 4th
In this addition worksheet, students practice their adding skills. Students are given twenty addition problems with missing sums or addends where students are to find the missing numbers.
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Worksheet
Curated OER

How Many More Do You Need

For Students 1st - 2nd
In this missing addends worksheet, students draw additional train cars to the existing picture to complete each addition sentence with a missing addend. Students also fill in the missing number.
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Worksheet
Curated OER

Missing Numbers Addition (A)

For Students 1st - 2nd
In this math worksheet, students solve 40 math problems in which there is a missing addend. Students fill in the missing number which makes the addition sentence correct.
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Worksheet
Curated OER

Missing Number Sum Activity

For Students 1st - 3rd
In this missing number worksheet, students fill in missing addends to reach the sum of 19, 8 problems total, then answer additional related questions.
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Worksheet
Curated OER

Adding Two Numbers

For Students 3rd - 4th
Keep addition drills interesting by varying the exercises. There are four separate sections here for youngsters to solidify their understanding of adding three-digit addends. First, they calculate eight vertically aligned equations,...