Curated OER
Rounding Decimals
Fourth graders engage in a lesson that is about the concept of rounding decimals. They review place value and focus it upon the practice of rounding. Students use 10 base decimal grids or models to help make connections with the skill.
Curated OER
Rounding Decimals
Fourth graders explore rounding a price given in dollar and cents to the nearest dollar. In this math lesson, 4th graders discover how to round to the nearest dollar. Additionally, students practice rounding money for objects that they...
Illustrative Mathematics
Equivalent fractions approach to non-repeating decimals
Trying to get your class to think of decimals as fractions and vice versa can lead to interesting discussions. After all, we can usually understand quickly that 1/4 is .25 but why is 1/7 not so easy to convert? This activity looks at...
EngageNY
Sums and Differences of Decimals
Sometimes dealing with decimals is so much easier than dealing with fractions. The ninth lesson in a 21-part module has the class consider situations when it might be easier to add or subtract fractions by first converting to decimals....
Curated OER
Introduction to Decimals
Young math whizzes complete the online instruction, then solve 20 problems about identifying decimals, comparing decimals and fractions and ordering decimals.
Curated OER
In Round Numbers
Students explore the concept of rounding. In this rounding lesson, students use their calculator to round three digit numbers to the nearest 10 or nearest 100. Students round fractional numbers to the nearest tenth, hundreth, and...
Curated OER
Estimating With Decimals
How can we estimate the answers when working with decimals? That's what the question is as the class reviews two-digit decimal addition. Have them estimate by rounding to a whole number either before or after they have completed their...
Curated OER
Number: Rounding Off and Approximating
Young mathematicians access a website that leads them through three activities that enable them to practice their rounding and estimation skills when it comes to numbers and math word problems. There is also a very good worksheet...
EngageNY
Fraction Multiplication and the Products of Decimals
Class members come up with a hypothesis on the number of decimal digits in the product of two decimals. Learners work in groups to complete several decimal multiplication problems. The results help groups develop a conjecture on the...
Curated OER
Number Sense
First graders practice rounding 4 digit numbers using place value concepts. In this estimating sums and differences lesson plan, 1st graders explore clustering, rounding, and front end estimation as methods for rounding decimals.
EngageNY
Grade 5 Math Module 1, Topic C, Lesson 7
Step up or step down to rounding. Using a vertical number line, the instructional activity shows pupils the significance of rounding up or rounding down. Teachers encourage scholars to write the number in unit form and decide which form...
Education Development Center
Micro-Geography of the Number Line
Young mathematicians dive into the number line to discover decimals and how the numbers infinitely get smaller in between. They click the zoom button a few times and learn that the number line doesn't just stop at integers. Includes a...
Curated OER
Study Buddies: Adding Decimals
For this math worksheet, students will work with a coach to add numbers with decimals to the hundredths place. Students will follow a step-by-step process and notes are provided for the coach.
EngageNY
Grade 5 Math Module 1, Topic C, Lesson 8
Go another round on rounding. Pupils refine their learned rounding skills in the eighth installment in an 18-part unit on decimals. The lesson takes away some of the previous scaffolding to encourage scholars to use the procedures that...
Illustrative Mathematics
Movie tickets
This is a good Common Core question that relates inflation to operations with decimals and rounding. Young learners are asked to find out if an amount of money can purchase the same amount of movie tickets in 2012 as it did in 1987. They...
Illustrative Mathematics
Shrinking
Is Aunt Nancy shrinking? Find out by calculating with the average height women lose each year. The activity practices multiplying and dividing with decimals and rounding the final answer.
Curated OER
Estimating Solutions
Finding approximate solutions to word problems allows users to assess the reasonableness of their answers. In a well-paced lesson, the class rounds numbers to estimate the solutions. They explain their thinking and determine if the...
EngageNY
Decimal Expansions of Fractions, Part 1
Is it possible to add infinitely long decimals? As pupils complete the examples in the ninth lesson plan of this 25-part series, they determine that adding these decimals cannot be done without error. Their task is then to determine the...
Curated OER
Our Solar System - Comparing Planetary Travel Distances
NASA presents a mini-unit on distances in our solar system. It incorporates scientific concepts of gravity, mass, density, and payload while your aspiring astronauts also employ mathematics skills. They calculate speed, they determine...
Curated OER
Rounding Numbers
Fourth graders complete math problems where they round numbers to the nearest ten, hundred, or thousand. In this rounding lesson plan, 4th graders explain how to round the problems they solve.
Curated OER
Estimating With Fire
Students solve problems with percents, decimals and fractions. For this algebra lesson, students convert between fractions, percents and decimals. They estimate their answers and calculate their answer.
Curated OER
It's Close Enough: Rounding and Estimation
Second graders round to the closest five, ten, and hundred. They use place-value concepts of grouping based upon powers of ten (thousandths, hundredths, tenths, ones, tens, hundreds, thousands) within the decimal number system.
Curated OER
Rounding And Estimating
Students investigate various types of problems using whole numbers and decimals. They use a discussion format while working example problems to help create a baseline for further independent practice. The lesson also includes praise for...
Curated OER
Operations with Fractions and Decimals
Complete a lesson that introduces and explores operations with fractions and decimals. Pupils estimate the reasonableness of a decimal computation. Then discuss what operation is needed to find an answer. Handouts, web sources, and other...
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