Lesson Plan
Curated OER

Investigation - Snack TIme

For Teachers K
Students explore solving addition and subtraction problems. They solve real life problems. Students participate in a simulation activity to find the missing addend. They demonstrate adding and subtracting whole numbers.
Worksheet
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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.
Worksheet
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Missing Addend and Subtraction 1

For Teachers 4th
In this mathematics learning exercise, 4th graders write the numbers and x to each picture. Then they write a missing addend sentence and a subtraction sentence to solve each problem. Students also write a missing addend sentence with x...
Worksheet
Curated OER

Decimal Addition-Missing Addends #2

For Students 3rd - 5th
In this decimal addition learning exercise, students supply the missing addend necessary to arrive at a given sum. Page includes an answer link.
Interactive
CK-12 Foundation

Addition and Subtraction of Polynomials: Sliders

For Students 8th - 10th Standards
Slide the coefficients to determine sums of polynomials. The interactive contains sliders to change the coefficients of an addend in a polynomial addition problem. Pupils determine the coefficients of the addend to arrive at particular...
Interactive
Arcademics

Hungry Puppies

For Students 5th - 6th Standards
It all comes down to the treats. Individuals compete to find decimals' addends to arrive at a given sum. Pupils click on two dog treats with values that add to the target number. Each round contains the same sum and lasts a minute, and...
Worksheet
Curated OER

Tens and Ones

For Students K - 2nd
Learners view three problems involving adding or subtracting with ones and tens. Each problem is followed by an explanation and an answer as to how the problem should be done. Note: This resource contains incorrect grammar and could be...
Worksheet
Curated OER

Addition - Adding on Ones Sheet 2

For Students 2nd - 3rd Standards
In this missing addend worksheet, students fill in missing addends to arrive at given sums. All numbers are 2-digit. A reference website is given for additional activities.
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.
Interactive
Curated OER

Complete the number sentence

For Students 2nd - 3rd
In this number sentence worksheet, students fill in the missing addend to the number sentence containing one digit numbers. Students fill in the 3 for the number sentence 3 + 6 = 9.
Worksheet
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Express The Length Whole Word Problems

For Students 1st - 2nd
Children in grades 1-3 will work to solve eight word problems involving length and whole numbers. They add, subtract, and problem solve to match the questions on the left to the answers on the right. Note: These problems are very poorly...
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...
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.
Worksheet
Curated OER

Add Groups of Ten

For Students 2nd - 3rd
In this addition worksheet, students add groups of tens and their remainders to determine the missing addends in the pairs of 2-digit problems and then find the sums. Students solve nine problems.
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...
Worksheet
Curated OER

Mystery Boxes

For Students 1st - 3rd
In this math worksheet, students solve the problems that use the operation of addition. They fill in the missing addends or sums as needed.
Worksheet
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Choose a Path

For Students 2nd - 4th
In this addition worksheet, students utilize data from a map to answer 6 fill in the blank questions where they provide the missing addends to addition problems.
Worksheet
Curated OER

Equations

For Students 3rd - 4th
In this finding the missing number learning exercise, students use the total number plus one addend to find the number that is missing. Students solve 10 problems.
Worksheet
Curated OER

Equations 2

For Students 3rd - 4th
In this finding the missing number worksheet, students use the total number and one addend to find the missing number. Students solve 10 problems.
Worksheet
Curated OER

Missing Items

For Teachers 1st
In this math worksheet, 1st graders solve the problems that use addition and the pictures of dice to figure out the missing addend to complete the number sentence.
Worksheet
Curated OER

Addition: Missing Sums and Addends

For Students 3rd - 4th
In this addition worksheet, students fill in missing sums and addends in a set of 20 problems. Some problems involve regrouping, answers are included on page 2.
Worksheet
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Find Missing Sums and Addends-No Regrouping

For Students 2nd - 3rd
In this addition learning exercise, students find missing sums and addends in a set of 20 problems without regrouping. Answers are included on page 2.
Worksheet
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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.
Worksheet
Curated OER

Missing Numbers in Two Digit Addition Worksheet #9

For Students 1st - 3rd
In this addition worksheet, students solve 20 problems in which missing numbers in two digit addition problems are filled in. There is no regrouping on the page.