DK Publishing
Money Word Problems #3
Money is an excellent way to help young mathematicians practice adding and subtracting numbers with decimals. They solve 15 word problems representing a variety of scenarios for calculating money. For some, scholars determine which bills...
Florida Center for Reading Research
Phonological Awareness: Phoneme Matching, Final Phoneme Pie
Words are interesting things—you can change them by adding or subtracting phonemes. Here, emergent readers change the pictures on their phoneme pie by removing or adding various final phonemes. A fun way to build phonetic competency!
Maths Blog
Make 20
There are quite a few ways to make the number 20 through addition. Learners fill in missing addends to reach the sum of 20 then answer additional related questions. This is a good resource because it has the class both add to 20 and...
EngageNY
Addition and Subtraction Formulas 1
Show budding mathematicans how to find the sine of pi over 12. The third lesson in a series of 16 introduces the addition and subtraction formulas for trigonometric functions. Class members derive the formulas using the distance...
Curated OER
Worksheet #10
In this mathematics activity, 2nd graders solve various problems by either adding or subtracting when necessary two-digit terms. They use a number line at the top for help solving each.
Curated OER
Subtracting Integers
In this integer worksheet, students subtract integers to solve a set of 10 problems. Answers and hints are available on-line; a reference web site for additional resources is given.
Curated OER
Subtracting Integers (II)
In this subtraction instructional activity, students complete subtraction problems containing parenthesis, up to 3 digit numbers, and negatives. Students complete 10 problems total.
Curated OER
Sharpen Your Skills: Addition and Subtraction
In this addition and subtraction worksheet, learners solve the equations that range from three digits to five digits. Students must either add to solve or subtract.
Curated OER
Magic Math Morning Work
In this doubles addition worksheet, students add doubles of one digit numbers up to the number 10. Students complete 10 addition problems.
Curated OER
Odd or Even?
There are multiple objectives at play here as scholars solve addition and subtraction problems and determine whether the sums and differences are odd or even. As they solve these, encourage pupils to observe patterns. What happens when...
EngageNY
The Geometric Effect of Some Complex Arithmetic 2
The 10th lesson in a series of 32, continues with the geometry of arithmetic of complex numbers focusing on multiplication. Class members find the effects of multiplying a complex number by a real number, an imaginary number, and another...
Del Mar College
Exponential and Radical Rules
So many rules and so little time. Make it easy and provide all the exponent and radical rules in one place as an easy reference guide. All of the properties come with several examples to show how the rules apply to different problems.
Curated OER
Translating Sentences to Equations
In this translating worksheet, learners translate word phrases to algebraic equations and then solve the equation. This one-page worksheet contains ten problems. Answers are provided on the page.
Curated OER
Solving Two Steps Equations
Students solve two steps equations. For this algebra worksheet, students follow specific steps to solve 2 steps equations. The steps are written out nicely for each student to follow along. This worksheet is a good guide for students...
Curated OER
Subtracting Integers: Math, Physical Education, Dancing, Negative Numbers
Students demonstrate their understanding of positive and negative integers by adding and subtracting. More importantly, students explain why a negative number, subtracted from a negative number, changes the operation.
Curated OER
Subtract Money Amounts
In this subtracting money amounts worksheet, students subtract the money amounts within the word problems. Students solve six word problems.
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...
EngageNY
Writing and Expanding Multiplication Expressions
Find out what's so standard about standard form. Scholars learn to write multiplication expressions with variables in the 10th lesson in a series of 36. They use different symbols for multiplication and translate between standard and...
Curated OER
Solving Word Problems with Fish
Send your class fishing...for the right answers! Small groups collaborate to create math word problems based on the fish in their classroom aquarium or on the aquarium itself. After all groups determine the answer for their ownproblem,...
Curated OER
More or Less Pigs in the Pen
Kindergarteners practice basic addition and subtraction. In this math instructional activity, students sing a song about pigs on a farm to help them understand the concept of adding and subtracting things together. Some excellent...
Curated OER
A Human Number Line
Eighth graders act out a number line using integers -10 to 10 on large cards. They practice addition and subtraction of these integers to gain explain the relative size of numbers.
Curated OER
Adding/Subtracting - More Than/Less Than
In this addition and subtraction worksheet, students answer the 20 questions on the page in which they are asked to write down a number that is one more or one less than the specified number. The answers are on the second page.
Curated OER
Subtracting Integers with Counters
Students subtract integers using counters. In this algebra lesson, students solve linear equations using an online tool. They use subtraction to isolate the variable.
Curated OER
Investigation - Snack TIme
Students explore solving addition and subtraction problems. They solve real life problems. Students participate in a simulation activity to find the missing addend. They demonstrate adding and subtracting whole numbers.