EngageNY
Square Roots
Investigate the relationship between irrational roots and a number line with a resource that asks learners to put together a number line using radical intervals rather than integers. A great progression, they build on their understanding...
EngageNY
Sampling Variability in the Sample Mean (part 1)
How accurate is data collected from a sample? Learners answer this question using a simulation to model data collected from a sample population. They analyze the data to understand the variability in the results.
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
Online Rounding Off Exercises
In this online rounding off numbers activity, students calculate a variety of exercises including five rounding off numbers nearest to ten, two number lines and rounding off twenty-four numbers to the nearest ten and hundred. Students...
Curated OER
Addition, Subtraction and Estimating
In this addition, subtraction and estimating worksheet, students answer 13 questions pertaining to addition, subtraction, estimating and even/odd or 2/3-digit numbers. They can click on the Check box to find out if their answers are...
Curated OER
Math Skills Review
In this math skills review worksheet, students solve 20 problems which pertain to place value, metric length conversions, placement of numbers on a number line and rounding to the nearest ten or hundred. This is intended as an online...
Curated OER
Math Review
In this math skills review worksheet, students solve 45 problems pertaining to inequalities, positive and negative integers, Roman numerals and coordinate pairs. This page is intended as an online activity, but may be completed on paper.
Curated OER
Rounding Off and Approximation
In this rounding worksheet, students round numbers to the given place value. They draw models of each given situations. This one-page worksheet contains 8 problems.
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
Estimating Fractions
In this estimating fractions learning exercise, 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...
Curated OER
Rounding Decimals to Hundredths (A)
In this math worksheet, students answer 60 rounding problems. All given numbers have 4 decimal places and are rounded to the nearest hundredth.
Curated OER
Rounding Up or Down?
In this rounding activity, students fill in columns, rounding given numbers both up and down; the correct answer is given in a 3rd column. A reference web site is given for additional activities.
Curated OER
Number Round-Up
In this math worksheet, students practice rounding numbers to the nearest ten, hundred, or thousand in sets of twelve. They round their ages to the nearest ten, and round a 5 digit number to the nearest ten, hundred, thousand, and ten...
Curated OER
Estimating 0-10
In this estimating worksheet, students estimate the whole numbers that arrows on a number line are pointing to, 0-10. A website reference for additional activities is given.
Curated OER
Reasonable Estimates
Help pupils explore estimation. They will make estimates and discuss when you might use an estimate. Then they discuss if their estimates are reasonable.
Illustrative Mathematics
Making Cookies
Hooray for chocolate chip cookies! Ask your mathematicians to triple a chocolate chip cookie recipe and then reduce the recipe by one-fourth. Your class may need two days to complete, tripling the recipe the first day and reducing the...
Curated OER
A Rounding Review
Fourth graders review rounding to the nearest ten, hundred, and thousand with this fun instructional activity centered around a visit to the computer lab.
Curated OER
Estimate How Many Seeds Are In a Fruit or Vegetable
Help mathematicians estimate how many seeds are in a given vegetable or fruit. They are divided into pairs and estimate the amount of seeds in a whole fruit without seeing the inside. They then cut the fruit or vegetable in half and...
CK-12 Foundation
Add and Subtract Decimals with Front-End Estimation: Wooden Beams
A six-question interactive tasks mathematicians to solve addition and subtraction problems using front-end estimation. Question types consist of multiple-choice and true or false. A set of wooden beams that can be measured using moveable...
Curated OER
Buying on Credit
Explore using credit in this financial responsibility and math lesson. Learn to identify the acronym of "PRT" as Principle x Rate x Time, then calculate interest based on this formula. Do some real-world problem solving and choose...
CK-12 Foundation
Estimation to Check Decimal Multiplication: Watering a Garden
Mathematicians solve six multiple-choice and true or false questions using their knowledge of estimation and multiplying decimals. The interactive provides a garden-themed tool that creates a visual aid of three watering cans to assist...
Illustrative Mathematics
How Many Leaves on a Tree?
This is great go-to activity for those spring or fall days when the weather beckons your geometry class outside. Learners start with a small tree, devising strategies to accurately estimate the leaf count. They must then tackle the...
Curated OER
Estimate Sums and Differences
In this estimating sums and differences practice worksheet, students sharpen their problem solving skills as they solve 6 story problems.
Curated OER
Decimals and Percents
In this decimals and percents worksheet, 8th graders solve 26 different types of problems that include expressing numbers as a decimal and a percent. Then they change each number to fractions and determine the unknown number for each...