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Showing Results for estimating to subtract

Advance your students from relative measurements to learning about standardized units with this lesson that teaches them about inches and feet by using common classroom objects. 

Estimating Length

Help your students subtract with confidence by sharing two different strategies. Use this lesson to build on students’ understanding of subtraction and to evaluate this key skill.

Subtraction with Regrouping

Teach your students to add and subtract time using number lines. Your class will be gladly moving backwards and forward to the minute solving for related word problems.

Timeline Solutions for Time Problems

Practicing subtraction using a thermometer for a number line makes math fun! In this lesson, your students will get more comfortable with subtracting two digit numbers.

Thermometer Subtraction: Number Line Adventures

This lesson is designed for fourth graders to practice their skills with the order of operations along with multiplying fractions and adding or subtracting decimals. 

Order of Operations with Fractions and Decimals

Dive deep into using base-ten blocks to solve two-digit subtraction problems with regrouping. This lesson can be used independently or in conjuction with the lesson Double Trouble: Subtraction Practice.

Regrouping with Base-Ten Blocks

Go to any length to test your students' understanding of perimeter calculations. Students will use their understanding of the perimeter of rectangular shapes to create rectangles that have different side measurements but equal perimeters.

Perfect Perimeter

This lesson helps students review rounding to the nearest hundred. Your students will practice rounding using manipulatives. 

Rounding Up to the Nearest Hundred

Use this lesson to introduce composing and decomposing as part of your students’ addition and subtraction toolkits.

Composing and Decomposing

With this pastry themed lesson, your students will apply addition strategies to solve two-step, three-digit addition word problems. Finding the solutions will be sweet!

Sweet Solutions

Get your students comfortable with discussing multiple strategies to solve subtraction problems with this lesson on two- and three-digit subtraction. It may be taught independently or as support for the lesson Subtraction with Regrouping.

Discussing Subtraction Strategies

Word problems can be overwhelming to students, but if they have a tool to help them, they can handle it! Use this as a stand alone lesson or alongside *Stepping Through Addition and Subtraction Word Problems*.

Thinking Deeply About Word Problems

Give your students the resources they need to solve word problems with this math lesson. Your class will learn how to categorize important keywords using a WIKED map, a visual tool that helps them through the problem-solving process.

Summertime Math Stories

Emphasize student understanding and reasoning! This lesson plan helps learners solve story problems using sense-making strategies. This can be used alongside the lesson Solving Word Problems or as a stand-alone lesson.

Reflect on the Context First!

This lesson helps students develop an ability to compare and contrast as they explore two strategies to solve three-digit addition problems. This EL Math lesson can be used alone or alongside Three-Digit Addition Strategies Review.

Comparing Strategies for Three-Digit Addition

Help! The numbers in our equations have run away and left their answers alone! In this lesson, students will review their math facts and knowledge to solve Ken Ken like puzzles and bring the numbers back to their places.

Missing Numbers: Math Review

Students will learn to model mixed number subtraction with manipulatives using this hands-on lesson plan.

Modeling Mixed Number Subtraction

Input some patterns to T-charts in this lesson. Use this lesson about input and output boxes as a precursor to finding patterns within word problems.

Input and Output Boxes

Use this lesson to teach your students how to determine if they should use addition, subtraction, or both operations to solve a word problem by following four simple steps.

Stepping Through Addition and Subtraction Word Problems

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