Curated OER
Two-Digit Addition and Subtraction (A)
In this two-digit addition and subtraction worksheet, students solve with mixed regrouping and no regrouping. Students solve 49 problems.
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Subtraction Relay
Learners play a team subtraction game, subtracting two-digit numbers and using addition to check their subtraction. They solve subtraction problems at the board while the team solves the same problem in their seats.
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Subtraction
Second graders regroup two-digit numbers and solve advanced subtraction problems with regrouping; students use straw and cup manipulatives to demonstrate how to borrow from the tens place in order to solve the problem.
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The Weight of Primates
Second graders practice their problem solving skills. In this addition and subtraction skills lesson, 2nd graders solve word problems that require them to find differences and sums. This lesson features the use of a video titled "Blossom...
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Subtracting Two-Digit Numbers
In this math worksheet, learners solve three word problems involving subtraction. The first problem is guided. Students use the questions to solve the problem. Learners solve two more problems without the guide questions.
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Two-Digit Addition With Regrouping
Second graders practice two-digit addition with regrouping. In this addition lesson plan, 2nd graders use craft sticks to solve two-digit regrouping problems. Students solve problems on the chalkboard.
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Subtraction two-digit
Second graders identify two-digit numbers, learn value of giving, solve two-digit subtraction problems, and experience giving.
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Add or Subtract Whole Numbers Up to 1000
Elementary schoolers solve practice problems on the board and are shown how to line up the numbers for addition. They solve various addition problems in small groups. Everyone continues the same process for solving subtraction problems.
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Subtracting with Regrouping
Second graders explore math functions by completing a worksheet in class. In this subtraction lesson, 2nd graders identify the techniques used to assist in subtracting multi-digit numbers. Students complete a subtraction worksheet and...
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One-Digit Addition and Subtraction No Regrouping (A)
In this math worksheet, students solve 81 problems in which one-digit numbers are added and subtracted. Problems are in a vertical format with addition and subtraction mixed in each row.
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Make a Match
Second graders examine the relationship between addition and subtraction. For this number sense lesson, 2nd graders practice their computation skills and use various strategies (including manipulatives and calculators) to add and subtract.
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Relationship Between Addition and Subtraction
Students are taught how to add and subtract and use number sense to solve basic math problems. In this addition and subtraction lesson, students are being taught using theories from different philosophers in education. They are given a...
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Math: Navigating the World Around Me
Young mathematicians research and discuss real world math word problems and ways in which they apply math concepts in their everyday lives. They create a storyboard of a math word problem from which they create a slide for a multi-media...
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Two Digit Subtraction No Regrouping
In this math literacy worksheet, students practice solving the 20 problems while focusing on the skill of subtraction while not using regrouping.
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The School Store
Students choose between the operations of addition or subtraction to solve a real life problem. In this addition and subtraction instructional activity, students make a chart of items sold in the school store. Students then work in teams...
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Investigation - Who is Right?
Third graders explore mathematics by solving problems in groups. In this math functions lesson, 3rd graders demonstrate their understanding of addition and subtraction by completing two digit math problems. Students define a list of math...
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A Fictional History of Place Value
Your class can explore standard and expanded notation, as well as computation with regrouping. They listen to a make-believe story about cavemen and the origin of numerals and place value. Then apply what they learned about renaming and...
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Less is More: Subtraction in Action
Students participate in group games to help review the concept of subtraction. During the games, they practice subtracting two-digit numbers and the concept of borrowing. They review their answers with the class and move on to...
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Subtraction with Regrouping
Second graders work with two-digit subtraction problem, identify the sums by playing Bingo, and create four subtraction problems for homework.
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Pattern Puzzles
A short video introduces place value in addition and subtraction. As a class, your young scholars identify all even numbers up to one hundred and explain the pattern. They use addition strategies to fill in the missing numbers on the...
NTTI
Putting Together Ten
Groups explore sets of 10 items in two varieties (i.e. 3 white buttons and 7 black ones, or 5 bears and 5 bunnies). They brainstorm about their objects, write math sentences to represent what they have, and report their discoveries to...
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Two By One Multiplication
Third graders use base-ten blocks to find products of two-digits by one-digit by making a model of the problem. They complete a worksheet by multiplying 2-digits by 1-digit with regrouping. They may use the base-ten blocks if needed.
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Junk Yard Math
Third graders explore the process of place value and subtraction through regrouping and borrowing exercises. Several activities using manipulatives are utilized in the lesson.
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Number Sense
First graders practice rounding 4 digit numbers using place value concepts. For this estimating sums and differences lesson, 1st graders explore clustering, rounding, and front end estimation as methods for rounding decimals.