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Showing Results for estimating to subtract

Many students cringe when they see a subtraction problem with multiple zeros. The “Subtract One” strategy in this lesson involves reducing the top number by one to turn the 0 digits into 9’s and then adding the one back in at the end.

“Subtract One” Strategy: Subtracting From Zeros Without Borrowing

Getting ready to subtract fractions? This lesson reviews how to subtract like denominators and teaches students how to subtract unlike denominators. The focus is on understanding the process and reasoning behind each step.

Subtracting Fractions with Different Denominators

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

This lesson will help students build an understanding of multiples as they learn how to subtract from multiples of 100!

Subtracting from Multiples of 100

Teach your students to add and subtract fractions with like denominators using a strategy that works for both operations: converting mixed numbers into improper fractions and back again!

Single Strategy for Adding and Subtracting Mixed Numbers

Teach your students to subtract mixed numbers with like denominators using the strategy of decomposition. This strategy helps students to manipulate and break down numbers to help them solve tricky subtraction problems. 

Subtracting Mixed Numbers Using the Decomposition Strategy

Can you break a ten? An everyday exchange of money can help students think about regrouping to subtract. Students will use bundled popsicle sticks to see how values grouped into tens can be regrouped into ones to allow us to subtract. 



Regrouping with Popsicle Sticks: Double-Digit Subtraction

Help students add and subtract decimals in this visual, hands-on, and delicious lesson! This lesson also reinforces place value concepts with decimals.

Candy Math: All About Decimals

This lesson combines three essential skills in one entertaining game! Students will need to add, subtract, and understand place value with decimals.

Decimals, Decimals, Decimals!

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

This lesson introduces students to measuring and estimating liquid volume, using liters (l) as the standard unit of measurement.

A Liter Please

What exactly does the number 97 mean? How about 454? In this lesson, students explore how two-digit numbers are made up of tens and ones. Then they use this understanding to subtract numbers within 1000.

Break It Down

Continue to build on your students' understanding of unlike denominators by asking students to justify their answers of fraction subtraction. Use this lesson with the Subtracting Fractions with Different Denominators lesson.

Subtracting Fractions Justifications

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

Start your students on subtracting three-digit numbers with this lesson that breaks the problems down by place values!

Fluently Subtracting within 1000

Does chaos ensue when your students subtract like mixed numbers and the larger fraction has a lesser numerator? Using this lesson plan, teach your class how to overcome this tricky obstacle: When having like denominators isn’t enough! 

When Having Like Denominators Isn’t Enough!

There’s more than one way to add and subtract mixed numbers! Use this witty lesson plan to teach your students to illustrate mixed number sums and difference while giggling with delight. 

Solving Mixed Number Word Problems Using the Three-Reads Strategy

Word problems getting you down? Then spread the word on a lesson that will help students decide when to add or subtract, as they identify clue words that aid in solving word problems. 

Solving Word Problems

Get your students explaining estimations and measurements of liquid volumes and masses of objects! Use this lesson independently or alongside *Estimating Measurements of Mass and Volume Using Metric Units.*

Which Unit of Measurement?

Use this support lesson to provide students with the opportunity to explore what it means to estimate. This hands on activity can be used alone or alongside the lesson Estimating Length.

The Language of Estimation

Students will become more familiar with common metric measurements by matching everyday objects with the metric mass and volume units they would use to measure them. 

Estimating Measurements of Mass and Volume Using Metric Units

Master rounding and estimating skills by having students challenge their classmates in the Make a Big Difference game. Roll three dice two times to arrive at two three-digit numbers. The largest difference wins!

Make a Big Difference

In this lesson, students will practice explaining the process of subtracting numbers up to 1,000 using base-ten blocks and peer feedback. Use this lesson on its own or as support to the lesson Fluently Subtracting within 1,000.

Sharing the Subtraction Process

Students will practice mentally adding and subtracting 10 to multiples of 10 up to 100 by playing an all time favorite: BINGO! Use alone or alongside the lesson Subtracting From Multiples of 100. 

Mental Math Bingo with Multiples of 10

Get ready for some mental math! Help students practice subtracting by ten by solving real-world problems involving dimes. 

Dimes, Dimes, Dimes

Get ready to do some shopping! In this lesson, students will learn about subtracting 100 from multiples of 100 when making big purchases. 

Big Spenders

It's as easy as one, two, three...four! Introduce your students to subtracting decimals in the tenth and hundredth place using a four-step process.

Step By Step Decimal Subtraction

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

Empower students to think like mathematicians by having them create word problems related to subtracting mixed numbers. Use this lesson on its own or as support to the lesson Subtracting Mixed Numbers Using the Decomposition Strategy.

Writing Questions for Word Problems

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. 

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Common Core

English Language Support

Showing Results for estimating to subtract