Curated OER
Estimating Quotients
Put down those calculators! Show scholars they can solve division problems mentally using rounding strategies. They divide four-digit dividends by one-digit divisors, competing 26 problems in all. The first eight have some scaffolding...
Achieve
Fences
Pupils design a fence for a backyard pool. Scholars develop a fence design based on given constraints, determine the amount of material they need, and calculate the cost of the project.
Concord Consortium
Rule of 72
Find an easier way to double it. Using the price of an item and the Consumer Price Index, learners determine how long it will be for the price to double. Scholars calculate the length of time it would take for the price to double using a...
Math Doctor
Chapter 5: Decimal Notation
Explore all things decimal in this thorough series of introduction activities. Including scripting for the teacher and detailed descriptions and examples, the plan begins by reviewing the basics of place value and writing fractions as...
Balanced Assessment
Fermi Estimates II
How many hot dogs does Fenway Park go through in a year? Learners estimate answers to this question and more as they work through the task. Problems require participants to make assumptions and use those assumptions to make estimations.
Curated OER
Speed Challenge
In this science learning exercise, students create a race track and mark each distance as stated. Then they perform each task and record the time it takes them for each. Students also record their data from the experiment into the chart...
Bowland
The Z Factor
Young mathematicians determine the number of hours it would take judges of the "Z Factor" television talent show to watch every act. Participants make estimates and assumptions to solve the problem.
Yummy Math
Valentine’s Day = Roses
Roses are red, but did you know that some are lighter while others are darker? Scholars read an infographic to decipher the fraction and percent of rose color and their country of origin. They go on to make comparisons and estimate while...
Mathed Up!
Scatter Graphs
Make an estimate by getting in line. The class works with scatter plots and lines of best fit to make an estimate for given values. Pupils determine whether there is a positive or negative correlation and draw a best-fit line. Using the...
Curated OER
Guess and Check Word Problems
Using the guess and check method, students solve six word problems involving multiplication and division. Each problem presents a different scenario for students to solve. The learning exercise could be used for individual or small group...
Illustrative Mathematics
Cynthia's Perfect Punch
Using a real-world example, this problem illustrates the thought process that learners need to engage in to understand adding mixed numbers with common denominators. First by looking at estimation, and then by drawing models that...
Curated OER
Compare Time
In this estimating time learning exercise, 2nd graders solve 6 problems in which the time it takes to perform a specific task is estimated. Students choose an estimate from two answers.
Louisiana Department of Education
Fractions, Decimals, and Percents
Fractions, decimals, and percents all say the same thing! Show your classes how to convert between the three forms using visual and numeric representations. Then lead them to an understanding of scientific notation.
Illustrative Mathematics
Irrational Numbers on the Number Line
There are four irrational numbers that participants need to graph. Pi(π), -(½ x π), and √17 are easy to approximate with common rational numbers. On the other hand, the commentary describing the irrational number 2√2 is not...
Curated OER
Fancy Foot- Estimating Whether a Line is Longer or Shorter Than a Foot
In this fancy foot estimation and measurement activity, 1st graders examine 3 curved lines and estimate whether they are longer or shorter than a foot. They use a foot-long string to check each answer.
Curated OER
Estimating Sums and Differences
In this estimation of sums and differences worksheet, 7th graders solve 20 different problems that are related to estimation of numbers. They add or subtract each problem as shown. Then, students estimate the sums and differences for...
Curated OER
Estimate Products: Reteach
In this estimating products worksheet, students review two steps to help estimate products. Students then estimate the products by rounding the factor greater than 10 to its greatest place.
Curated OER
Activity: Estimate Time
In this estimating time review worksheet, students practice their estimation skills as they estimate how many times they can do 3 activities in 1 minute. Students check their work and then identify things that take them 30 seconds, 5...
Curated OER
Estimating Decimals
In this estimation activity, students learn to estimate with decimal numbers by using rounding or compatible numbers. There are 10 problems.
Curated OER
Rounding Decimals to Tenths (J)
In this rounding numbers learning exercise, students practice their math skills as they examine 60 decimal numbers and round them to nearest tenth place.
Curated OER
Rounding Decimals to Hundredths (C)
In this rounding numbers worksheet, students practice their math skills as they examine 60 decimal numbers and round them to nearest hundredths place.
Curated OER
Rounding Decimals to Tenths (H)
In this rounding numbers worksheet, students practice their math skills as they examine 60 decimal numbers and round them to the nearest tenth place.
Curated OER
Rounding Decimals to Tenths (I)
In this rounding numbers worksheet, students practice their math skills as they examine 60 decimal numbers and round them to nearest tenth place.
Curated OER
Estimate Using Tens
In this estimate using tens worksheet, 2nd graders match three sets of toys with 3 jars by estimating using tens and reading the label on the jar.