Houghton Mifflin Harcourt
Intensive Math
Three chapters worth of integer, fraction, and decimal problems to give you every type of question your learners need to be a successful mathematician. Thankfully the work has been done for you and this is a huge resource full of...
Curated OER
Book Title: Ten Flashing Fireflies
This instructional activity engages learners in a variety of activities to build 1 to 1 correspondence, estimation, and problem solving skills. They discuss problem solving strategies, hear the story Ten Flashing Fireflies, compose their...
Curated OER
Add and Subtract
Like the cubs in A Fair Bear to Share, your 2nd grade class will practice adding and subtracting double-digit numbers by grouping, regrouping, and sorting a collection of objects. This requires many resources, but it is well worth the...
Curated OER
Adding and Subtracting Fractions with Like and Unlike Denominators
In this math worksheet, students compute with fractions. Five of the problems involve common denominators. Four of the problems require students to first find the common denominator. Six problems are multiple choice. One problem involves...
EngageNY
Adding and Subtracting Polynomials
Need a unique approach to adding and subtracting polynomials? A helpful math lesson approaches the concept by relating polynomials to base 10. It encourages pupils to see each term as having a specific value, and therefore, they should...
Maths Blog
Understand Subtraction - Take Whole Tens
Use a number line to demonstrate subtracting by tens. Learners "hop" backwards down a tens number line to complete subtraction equations. Several different ways to express the operation are included.
Curated OER
Subtracting Numbers Up to Ten--Speed Racing
For this subtraction worksheet, learners subtract 20 single-digit math problems as fast as they can in 2 speed races. Students write their answers on the worksheet provided.
Curated OER
Subtracting Numbers Up to Ten--Speed Racing
For this subtraction worksheet, students subtract 20 single-digit numbers as fast as they can in 2 speed races. Students write their answers on the worksheet provided.
Curated OER
Subtracting 9 from 2-Digit Numbers
In this subtraction worksheet, students subtract the number nine from the given two-digit numbers. Students complete twenty problems.
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
Using Number lines in Addition and Subtraction
Adding and subtracting can be done by counting on or counting down a number line. This presentation provides a complete demonstration and examples of how one can use a number line to solve double-digit addition and subtraction problems....
Curated OER
Math Subtraction Worksheet: Subtract a 1 digit number from a 2 digit number
In this subtraction activity, students solve 20 subtraction problems; all problems subtract a 1-digit number from a 2-digit number.
Curated OER
Subtracting From a Multiple of 10
In this subtraction worksheet, 2nd graders are instructed how to subtract two digit numbers from multiples of 10 by counting on. There are two pages with 10 problems on each page.
Curated OER
Subtraction
Learners explore subtraction. In this mathematics lesson, students practice how to subtract numbers from 20, 100 and other whole numbers. Learners realize that there are number bonds which can help with subtraction like 3 and 17 bonds to...
Illustrative Mathematics
Discounted Books
Adolescents love to shop, especially when an item is discounted. Here, shoppers only have a set amount of money to spend. Will they be able to make a purchase with the discount and tax added in? Percent discounts can be calculated...
Curated OER
Primary Understanding and Use of Place Value
Explore place value and regrouping with your class. They develop awareness of several ancient number systems and how they differ from the base ten system commonly used today. They play "Chip Trading" with partners to practice addition...
Curated OER
Add and Subtract Integers Worksheet
For this adding and subtracting integers worksheet, students review integer rules by completing 19 drill and practice questions. They work in pairs to compute the total left in a fictitious bank account after several withdrawals and...
Curated OER
Place Values - Subtracting
Students explore the concept of place value. In this place value lesson, students subtract numbers from a specific place value.
Curated OER
Word problems involving number relationships
In this Algebra I instructional activity, 9th graders solve word problems in one variable that are based on relationships in numbers. The one page instructional activity contains thirty problems. Answers are not provided.
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
Subtracting Bigger Numbers: 5-, 6-, and 7-Digit Numbers
Can your fourth graders subtract numbers in the millions? Practice subtracting multi-digit numbers with a straightforward activity. The first 12 problems are formatted vertically, while the next two problems are horizontal. The final...
Curated OER
Addition: Number Bonds to 10
You have the answer and a variable, but something is missing! The class fills in the missing addend in 23 practice problems that all add up to 10. This is a great way to build number sense, pattern recognition, and automaticity.
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, learners are taught how to first make a ten and then add on the rest. A similar method is also...
Curated OER
10 More or 10 Less
Practice adding and subtracting 10 with this outer space worksheet. On the top, scholars match digits floating in stars with sums inside a spaceship. Next, they do the same with subtracting 10, connecting numbers to differences. These...