Worksheet
Curated OER

Estimate the Sum

For Students 4th - 5th
In this estimating sums activity, students round each number in addition problems to the nearest hundred and solve. Answers are included on page 2.
Lesson Plan
Curated OER

Rounding and Subtracting

For Teachers 6th - 8th Standards
Common Core is all about getting your learners to open their minds and think about the why and how. This problem has them thinking about unknown numbers and their relationship with one another when we round and...
Lesson Plan
Curated OER

Study Buddies: Adding and Subtracting Decimals

For Teachers 2nd - 3rd
In this math worksheet, students will work with a coach to add and subtract numbers with decimals to the hundredths. Students will follow a step-by-step process and notes are provided for the coach.
Lesson Plan
National Security Agency

Borrowing from Our Neighbors

For Teachers 2nd - 4th Standards
Young mathematicians explore two-digit subtraction. They will investigate multiple ways to subtract numbers involving regrouping. Resources are provided.
Lesson Plan
PBS

Estimating Profit from a Job

For Teachers 5th - 8th Standards
Profit always seems to get everyone's attention. The same is true during a lesson on estimation. Learners use given information to estimate the cost of supplies for a painting job. They then develop a strategy for estimating the...
Lesson Plan
Curated OER

Math: Navigating the World Around Me

For Teachers 4th - 6th
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...
Worksheet
Curated OER

What Do You Think?

For Students 2nd - 3rd
In this estimating sums and differences worksheet, students solve 6 problems in which the answer to a 3 digit addition or subtraction problem is estimated. Students then solve the problem for an exact answer. There will be carrying and...
Lesson Plan
Curated OER

Number Sense

For Teachers 1st
First graders practice rounding 4 digit numbers using place value concepts. In this estimating sums and differences lesson, 1st graders explore clustering, rounding, and front end estimation as methods for rounding decimals.
Lesson Plan
Curated OER

Matter

For Teachers 4th - 6th
Students complete a unit of activities to learn about states of matter and how to measure matter. In this matter lesson, students complete 8 lessons to learn about matter, its states, and how to measure matter.
Worksheet
Curated OER

Estimate the Sum

For Students 3rd - 4th
In this rounding to find the sums worksheet, learners round to the nearest thousandths and add. Students solve nine problems. 
Worksheet
Curated OER

Estimating Fractions

For Students 6th - 7th
In this estimating fractions worksheet, students solve 20 various problems that include estimation in each. They estimate the sum or difference in each of the problems shown on the sheet. Students calculate each mixed number into a...
Lesson Plan
Curated OER

Estimating Solutions to Word Problems

For Teachers 4th
Learners use estimation to determine the answers to word problems by rounding whole numbers. For this estimation lesson plan, pupils compare and contrast solutions using the best answer.
Lesson Plan
Curated OER

Mental Math Counts

For Teachers 5th - 7th
Pupils use mental math. They describe reasonable and unreasonable sums and differences. Students use mental math to find the sums and differences of addition and subtraction facts at random. They solve addition and subtraction facts...
Lesson Plan
Curated OER

Finding Sums to 6

For Teachers Pre-K - 2nd
Young scholars explore the additive identity property where they add multiple numbers to get to the number 6. In this number 6 lesson plan, students also work on their addition charts.
Lesson Plan
NTTI

Putting Together Ten

For Teachers 1st - 2nd Standards
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...
Lesson Plan
Alabama Learning Exchange

Estimation Station: Why Estimating is Better than Guessing

For Teachers 3rd - 5th Standards
Youngsters discover the difference between estimating and guessing. They estimate how many items are contained in a jar as they read a story. After the story, pupils discover the differences between estimating and guessing and create a...
Lesson Plan
Curated OER

Spending Spree

For Teachers K - 4th
Students collect objects to use in a classroom store. In groups, they must place a value on each object and take turns spending their fake dollar in the store. They predict how much they can buy and use addition and subtraction to...
Assessment
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California Education Partners

John's Trip Disneyland

For Students 5th Standards
It all adds up to one. Pupils solve several items that involve finding sums of fractions in relationship to a whole. The assessment task uses fractions with unlike denominators to determine the amount of a tank of gas and the amount of...
Lesson Plan
Curated OER

The Number Partner

For Teachers 1st
First graders study number pairs and identify number pairs that sum to numbers from 10 to 30. They use number pairs to solve addition and subtraction problems. They make sensible estimates and check the reasonableness of answers.
Lesson Plan
Curated OER

Solving Problems

For Teachers 2nd
Second graders become familiar with need strategies for computation of money problems and estimating sums. In this computation lesson, 2nd graders solve real life problems to understand estimation and money problems.
Lesson Plan
Curated OER

Estimating Solutions to Word Problems

For Teachers 4th
Fourth graders explore number sense by completing word problems in class. In this estimation lesson, 4th graders define terms such as sum, difference, estimate and best. Students complete estimating worksheets based on the concept of...
Worksheet
Curated OER

Calculating with Significant Digits

For Students 9th - 12th
In this significant digits worksheet, students are given the rules to finding significant digits when adding, subtracting, multiplying and dividing. Students solve ten problems and express their answers with the proper number of...
Lesson Plan
Curated OER

Study Buddies: Using Front-End Estimation

For Teachers 4th - 5th
In this math worksheet, students will work with a coach to estimate equations using front-end estimation. Students will follow a step-by-step process and notes are provided for the coach.
Lesson Plan
Curated OER

Mental Math Blocks 2

For Teachers 3rd - 4th
In this math worksheet, learners solve eleven math problems. Students solve the problems by using multiplication, division, subtraction, and addition.

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