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Primary Junction
Adding Tens
Build on your learners' confidence in quick addition as they discover strategies to add tens to two-digit numbers. After reviewing counting by 10's, they discuss tactics to add multiples of 10 to other numbers. They visualize how to...
Houghton Mifflin Harcourt
Mental Math: Subtract Tens - Homework 12.1
Now that your class can add by 10s they can start subtracting by 10s. This clear, learner-friendly worksheet provides a good example (10-rods are pictured) and 7 problems to solve. Relates groups of tens to single-digit numbers, which...
Illustrative Mathematics
Comparing Numbers
Young mathematicians spin their way to a deeper number sense with this fun, collaborative activity. Using two spinners, one with the numbers 0-9 and the other with the decades 00-90, pairs of young scholars take turns building and...
Curated OER
Add Tens and Ones
Six story problems challenge young mathematicians to add single- and double-digit numbers. Manipulatives would come in very handy for primary graders tackling this worksheet. Some of the sums have addends as large as 25 and 33. Some...
Math Worksheets Land
Add up to Four Two-Digit Numbers - Step-by-Step Lessons
Okay, so your scholars are excelling at two-addend addition problems, but what about three or four? Here are some practice problems to stretch their math skills. They find the sums of six equations: two with two addends, two with three...
Willow Tree
Rational vs. Irrational Numbers
Build an understanding of rational numbers and their counterpart irrational numbers. Lead learners through an explanation of rational numbers and the ways they can be expressed. Then introduce them to irrational numbers and make...
Curated OER
Two-digit Addition and Subtraction
Often times we use tens and ones workmats to show how to add single and double-digit numbers. This worksheet has the labeled tens and ones columns built-in. Learners are provided with 16 charts, all you need to do is add the numbers.
Scholastic
Look for Easy Numbers for E-Z Addition
All kids learn differently. For some, mental math is the best and most efficient way to add a series of numbers. After viewing a few sample problems, learners find ways to add numbers to 10 before adding them all together, and then write...
Curated OER
One and Tens Place Value - Step-by-Step Lesson
Give your pupils a grasp of place value in a two-digit number. They see a drawing of counting cubes in a stick of ten, then examine a set of four. Mathematicians determine how many blocks there are by grouping the tens. Ideally, you will...
Curated OER
All Kinds of Numbers
Count and compare numbers and fractions using "greater than" and "less than." Learners count on by 2s and 10s and represent the end number with base ten blocks, counters, and cups. They use circle stickers to illustrate fractions and...
Curated OER
Add Tens and Ones
In this finding the sum worksheet, students add two-digit plus two digit numbers in ones and tens place values with regrouping. Students solve 12 problems.
Curated OER
Mental Math: Breaking Apart to Add
Develop mental math addition skills by breaking apart addends into 10s and extras. Worksheet has problem solving steps at the top of the page, and 8 practice exercises that lead to increasing independence using the process.
Scholastic
Study Jams! + and - Without Regrouping
Addition and subtraction are essential skills for all young mathematicians. Explain the step-by-step process with respect to place value using these real-world examples. Focus is on numbers in the tens, hundreds, and thousands, making...
PHET
Make a Ten
Rate the resource as a perfect 10. Pupils use an interactive to help add and subtract numbers. They first explore how to express whole numbers using hundreds, tens, and ones, then explore how to add whole numbers by combining to make...
Raytheon
Adding and Subtracting Decimals
For this adding and subtracting decimals instructional activity, students add and subtract numbers with decimals in word problems. Students complete 12 word problems.
CK-12 Foundation
Mental Math to Multiply by Whole Number Powers of Ten: The Rule for Tens
Eight questions challenge scholars to use mental math while multiplying whole numbers by powers of 10. A tool with bouncing decimals demonstrates how and where the decimal moves. Question types include several multiple-choice, a...
Curated OER
Find the Sums (Under 100)
All of these sums are under 100: learners practice with three types of addition problems, each with two equations. First, they add a double-digit and single-digit number. Then, scholars add two double-digit numbers, one being a multiple...
Curated OER
Working with 10s and 1s, Part 2
Practice place value by visualizing 10s and 1s. First graders count the cubes in each place, then write the total number at the bottom. In one particularly helpful section, they draw the cubes that will add up to a given number. Bring in...
Math Worksheets Land
Add and Subtract to 100
Give your scholars some basic practice with addition and subtraction problems. Because the answers are explained at the bottom, consider projecting this and covering up the bottom, revealing only after class responses have been shared....
Curated OER
Add and Subtract within 1000
Here are some practice problems with adding and subtracting three-digit numbers. Scholars complete three addition problems and three subtraction problems. None of these involve carrying over or regrouping. There are only two numbers to...
Curated OER
Ones and Tens Place Value
As scholars examine place value, these exercises help them incorporate addition and grouping. First, they answer three missing-addend questions, each with 10 as the given addend. Because all of the missing numbers are single-digit, this...
Curated OER
Add and Subtract to 100
These addition and subtraction problems probably aren't written the way your scholars are used to seeing them, especially since they have double-digit addends and subtrahends. This set of eight horizontal equations gives...
Curated OER
Comparing and Ordering Fractions, Mixed Numbers, and Decimals
Students practice comparing and ordering fractions, mixed numbers, and decimals. In this fractions, mixed numbers, and decimals lesson, students examine a decimal place value chart compared to a whole number place value chart. They...
Curated OER
Odd Numbers, Standard Form, and Place Value
In this math worksheet, students answer multiple choice questions about odd numbers, standard form, place value, and more. Students complete 10 problems involving up to 5 digit numbers.