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....
Houghton Mifflin Harcourt
Unit 4 Math Vocabulary Cards (Grade 2)
Enhance math vocabulary instruction with a set of flash cards. The set displays words with bold font and corresponding picture cards with labels. Terms include estimate, regroup, round, add, and sum.
Los Angeles County Office of Education
Assessment for the California Mathematics Standards Grade 3
Assess scholars' knowledge with a 22-page assessment that covers place value, patterns, probability, estimation, measurement, geometric figures; and their ability to add, subtract, multiply and divide proficiently.
Curated OER
Practice: Word Problems
Congratulations, you've just hit the word problem jackpot! Covering an incredible range of topics from integers and fractions, to percents, geometry, and much more, this collection of worksheets will keep young mathematicians busy...
Curated OER
Estimate the Difference
In this estimation worksheet, students estimate the difference by rounding each two-digit number to the nearest ten. Students complete ten estimation problems.
Curated OER
Estimate Sums and Differences
In this estimating sums and differences practice worksheet, learners sharpen their problem solving skills as they solve 6 story problems.
Curated OER
Estimating with Rational Numbers
Middle schoolers explore the concept of rounding. In this rounding lesson, students round fractions and mixed numbers. Middle schoolers estimate the sums, differences, products, and quotients of rounded fractions and mixed numbers.
Math Mammoth
Rounding
In this math instructional activity, learners solve the problems that are based upon the skill of rounding. The answers are written into one of the 4 sets.
Curated OER
Book Title: Great Estimations
Explore estimation with your math class. They will estimate how many Cheerios are in a box. Then count and group 50 Cheerios on a twist tie and attach groups to represent hundreds. They then discuss and practice skip counting and revise...
Curated OER
Multiplication Facts up to 10 X 10
Here is a presentation that's chock full of great tips on how to memorize multiplication facts, and how to calculate the area of shapes that aren't perfect squares or rectangles. Many good problems are in each of the slides. A great...
Curated OER
Estimating Sums and Differences
In this math worksheet, pupils learn to estimate sums and differences by completing step by step exercises. There is one word problem which is the example, and then students can choose from other estimation activities to do with a partner.
Curated OER
Estimate Sums: Problem Solving
In this estimating sums worksheet, students use the table with point totals from a ring toss game. Students use the total points to estimate the sums for each word problem.
Curated OER
Estimate Sums
In this estimating sums activity, students solve the six word problems using the information within the problem to estimate the sums.
Curated OER
Rounding to Add #2
In this addition activity, students round addends to the nearest 10 to estimate sums. A website reference for additional resources is given. One example is completed for students.
Curated OER
Estimating to Check Results- Reteaching Worksheet
In this estimating to check results reteaching worksheet, 1st graders examine how to use estimation to check their addition. They apply the steps to solve and check 2 word problems.
Curated OER
Estimating Units of Length
Would you measure the height of a living room in centimeters? Scholars examine which units would be most efficient for this project: centimeters or meters. There is only one question here with a detailed explanation below. This would be...
Curated OER
Estimating and Testing Steps
Students predict how many steps they think it will take them to get from the front of the room to the back. They record predictions on paper and then into database and then actually test by walking foot to foot to their destination...
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
Rounding
In this rounding worksheet, students solve 40 problems in which whole numbers are rounded to the nearest 10. 100 or 1000. Students also round to the nearest dollar.
Curated OER
Estimating and Subtraction
In this estimating and subtraction worksheet, students answer 11 subtraction questions in which they round to estimate the answer and then solve. The last question is a subtraction question that does not involve rounding. They can click...
For the Teachers
$1 Math
Captivate your class by having them find the value of their names, different zoo animals, musical instruments, etc.,with a mental math lesson. Using the coding formula listed, children learn to fluently estimate and calculate simple sums.
Federal Reserve Bank
Sky Boys: How They Built the Empire State Building
How tall is the Empire State Building? Lead your class through a collaborative estimation activity to determine the number of quarters it would take to reach the top and teach the following concepts: human capital, human resources,...
National Wildlife Federation
I’ve Got the POWER! Solar Energy Potential at Your School
Should every school have solar panels? The 19th lesson in a series of 21 has scholars research the feasibility of using solar panels at their school. They begin by gathering data on the solar energy in the area before estimating the...
Curated OER
Estimating Prices
Students practice making reasonable estimates. In this consumer math, students round purchase prices of items to estimate the total cost. Students practice using metal computations to arrive at estimates.