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Curated OER
Number Stories
Students write and solve various number stories. They solve number stories using one, two and three digit numbers. Students practice writing sentences using the following 6+1 traits, ideas and content, organization, word choice and...
Curated OER
Subtraction In Two Digits
In this math activity, students find the answers to the subtraction problems using two digits. The answers are found at the bottom of the page.
Curated OER
Subtracting Twos (A)
In this subtraction review learning exercise, students use problem solving skills to solve 21 problems that require them to subtract 2 from various 1 digit numbers.
Curated OER
Subtraction Worksheet
For this math worksheet, students look for the answers to the 25 subtraction problems. The solutions are found at the bottom of the page.
Curated OER
A Frightening Mix of Math, A-Add or Subtract, But Look Out for the Monsters
In this math worksheet, students add and subtract. Fifteen problems are subtraction, students subtract two digit numbers from three digit numbers. Regrouping is required. Twenty-one problems are addition, students add two digit numbers...
Curated OER
Mystery Numbers
In this mystery number worksheet, students begin with a 3 digit number and using the code key, find the sum or difference in each shape as a spiral puzzle is solved.
Curated OER
Use Negative Numbers
In this problem solving worksheet, students read and solve 6 story problems pertaining to borrowing and paying back money. Students use instead simple subtraction and addition. No answers will be negative numbers.
Curated OER
Triple Digit Subtraction
In this math worksheet, students look for the answers to the 25 subtraction problems on the sheet. The ads are not appropriate for kids.
Curated OER
Subtract by Finding Difference-Counting On
In this subtraction worksheet, students solve a total of 10 problems, first "counting on" to solve, then determining whether to partition or count on to complete additional problems.
Curated OER
Estimating Sums and Differences
Work on rounding, estimating, adding, and subtracting with a helpful math worksheet! Fifth graders study different sets of addition and subtraction problems, and after rounding each number to the leading digit, they estimate what the sum...
Helping with Math
Addition: Number Bonds to 20
Pupils fill in the missing addend to an addition problem that adds up to 20. This number could be a one-digit or two-digit number. They complete a total of 41 missing addend problems. Answers are available.
Curated OER
Estimating Differences of Money
When it comes to money math, show scholars that estimation is their best friend. They round money values to the closest dollar, 10 dollar, and 100 dollar increments, solving 19 addition and subtraction problems with approximate answers....
Curated OER
Credible Sources on the Internet: What to Trust, What to Dismiss and When to Cite a Source
Wait, you mean researchers don't all use Wikipedia? Teach your class about intelligent research with a lesson about evaluating digital sources. The lesson starts with a quickwrite and includes vocabulary exercises and several...
Curated OER
Making a Ten
An addition table supports third graders as they learn strategies to improve their math fluency. When finding sums greater than ten, students are taught how to first make a ten and then add on the rest. A similar method is also...
Curated OER
Rounding and Significant Digits
Practice rounding numbers to a certain decimal by solving in-class problems. Learners will solve several multiplication, division, addition, and subtraction problems while rounding to a specific decimal. They will also check their work...
Curated OER
Identifying Patterns
Find the pattern! Eighteen number sequences challenge scholars to identify and complete the pattern, adding at least four digits to the given numbers. All the sequences here involve skip counting by various single-digit numbers,...
DK Publishing
Counting Caterpillars
These caterpillars each have a number sequence printed on their segmented bodies, but some numbers are missing! Look at the completed caterpillars as an example, asking kids to notice a possible pattern. They should observe that the...
Curated OER
Comparing Kwakiutl, Cheyenne and Navajo tribes
Third graders study the difference between the Kwakiutl, Cheyenne and Navajo tribes. They identify the people, resources, lifestyle and beliefs of the Kwakiutl, Cheyenne, and Navajo Indians. Afterward, they present their projects on each...
Curated OER
Idioms in Everyday Language
Learners describe idioms and their use in everyday language. They describe the difference between literal and idiomatic meanings. In groups, students use iPhoto to create books that explain and illustrate a variety of idioms describing...
Curated OER
Counting by 3s, 4s, and 5s
Skip count along the mushrooms to complete these number sentences which give young scholars an introductory look at addition and subtraction. Starting from five double-digit numbers, they subtract or add by threes, fours, and fives to...
Curated OER
Missing Addends
Where are all the addends? Addition novices solve 36 equations by filling in the single-digit addend to achieve the given sum. They reference several examples, each of which include object sets to help learners visualize the...
Illustrative Mathematics
Identifying Multiples
Administer an activity that fosters a child's understanding of multiples. Young mathematicians are guided to complete three tasks on a multiplication chart. Once they color the boxes with multiples of two, three, and four, learners...
Curated OER
Mondrian - Primary/Secondary Color Study
Utilizing computer software, learners demonstrate the color spectrum. They investigate the life of the artist Piet Mondrian and define his style of artwork. Then they use Photoshop to recreate some of his designs while discovering the...
Charleston School District
Scientific Notation Operations
How do you operate with numbers in scientific notation? The resource provides examples on how to divide and multiply with numbers written in scientific notation. The handout and video also cover the procedure for addition and subtraction...