CK-12 Foundation
Ck 12: Elem Math: Addition: Complete the Addition Sentence
[Free Registration/Login may be required to access all resource tools.] A video [0:56] and practice questions where students find a missing number in addition sentences with sums to 1000.
CK-12 Foundation
Ck 12: Elem Math: Addition Select the Incorrect Sentence
[Free Registration/Login may be required to access all resource tools.] Students practice finding the addition sentence that is not equal to the desired sum.
CK-12 Foundation
Ck 12: Elem Math: Addition: 3 Digits
[Free Registration/Login may be required to access all resource tools.] A video and practice questions on adding 3-digit numbers with regrouping. [1:32]
CK-12 Foundation
Ck 12: Elem Math: Addition Complete the Addition Sentence
[Free Registration/Login may be required to access all resource tools.] The video shows how to work backwards to solve a 3-digit addition problem. The video is followed by practice problems covering the topics in the video.
CK-12 Foundation
Ck 12: Elem Math: Addition: Select the Correct Sentence
[Free Registration/Login may be required to access all resource tools.] A video and practice questions with sums to 1000 where students determine which addition sentence matches the given sum. [1:07]
CK-12 Foundation
Ck 12: Elem Math: Addition Select the Correct Sentence
[Free Registration/Login may be required to access all resource tools.] The video shows how to solve addition problems to determine which math sentence matches the given sum. The video is followed by practice problems covering the topics...
CK-12 Foundation
Ck 12: Elem Math: Addition Select the Incorrect Sentence
[Free Registration/Login may be required to access all resource tools.] The video shows how to solve addition problems to determine which math sentence does not match the given sum. The video is followed by practice problems covering the...
CK-12 Foundation
Ck 12: Elem Math: Addition 3 Digits
[Free Registration/Login may be required to access all resource tools.] The video describes how to solve a 3-digit addition problem. The video is followed by practice problems covering the topic in the video.
CK-12 Foundation
Ck 12: Elem Math: Addition Select the Correct Sentence
[Free Registration/Login may be required to access all resource tools.] The video describes how to determine which addition problem matches the given sum. The video is followed by practice problems covering the topics in the video.
University of Texas at Austin
University of Texas: Elementary Math Club: Number Paths
Learners explore connections between addition, subtraction, and multiplication. In addition, students review place value and learn about the distributive law. The lesson plan includes an overview and a lesson toolkit.
CK-12 Foundation
Ck 12: Elem Math: Adding Pictures Sums to 20
[Free Registration/Login may be required to access all resource tools.] The video utilizes a picture model to describe how to add sums up to 20. The video is followed by additional practice problems.
CK-12 Foundation
Ck 12: Elem Math: Adding With Pictures Word Problems Sums to 20
[Free Registration/Login may be required to access all resource tools.] The video uses the picture and describes how to add two numbers with a sum less than 20. The video is followed by additional practice problems.
CK-12 Foundation
Ck 12: Math Grade 1
Browse resources related to first-grade math standards. Click on a topic for interactive lessons, videos, and extra practice.
CK-12 Foundation
Ck 12: Math Grade 2
Browse resources related to second-grade math standards. Click on a topic for interactive lessons, videos, and extra practice.
CK-12 Foundation
Ck 12: Inequalities With Addition and Subtraction of Fractions
[Free Registration/Login may be required to access all resource tools.] CK12: Inequalities with Addition and Subtraction of Fractions
CK-12 Foundation
Ck 12: Elem Math: Two Step Addition Sums to 100 Word Problems
[Free Registration/Login may be required to access all resource tools.] The video shows how to break down a word problem into two steps to solve an addition problem with numbers up to 100. The video is followed by a series of practice...
CK-12 Foundation
Ck 12: Elem Math: Relating Addition and Multiplication
[Free Registration/Login may be required to access all resource tools.] The video lesson explains the relationship between repeated addition and multiplication. The video is followed by a series of practice questions to assess student...
CK-12 Foundation
Ck 12: Elem Math: Sums of Whole Numbers to 1000 (Grade 3)
[Free Registration/Login may be required to access all resource tools.] This site offers the video "Addition: 3 Digits." and a practice quiz in which students solve problems using addition to find the sum or summand of numbers up to 1000.
CK-12 Foundation
Ck 12: Elem Math: Selecting the Correct Addition Sentence Sums to 100
[Free Registration/Login may be required to access all resource tools.] The video walks through solving addition problems to determine which problem is the correct addition sentence for the given sum. The video is followed by additional...
CK-12 Foundation
Ck 12: Elem Math: Comparing With Two Step Addition and Subtraction Word Problems
[Free Registration/Login may be required to access all resource tools.] The video is a 2 part word problem using addition and subtraction of 2-digit numbers. The video is followed by practice problems to assess student understanding of...
CK-12 Foundation
Ck 12: Elem Math: Selecting the Related Addition Fact
[Free Registration/Login may be required to access all resource tools.] The video describes the parts of an addition problem and explains why addition facts are related. The video is followed by a series of practice questions to assess...
CK-12 Foundation
Ck 12: Elem Math: Completing the Addition Sentence Sums to 100
[Free Registration/Login may be required to access all resource tools.] The video shows how to work backwards to find the missing number in a 2-digit addition problem. The video is followed by practice problems to assess student...
CK-12 Foundation
Ck 12: Elem Math: Selecting the Related Addition Fact
[Free Registration/Login may be required to access all resource tools.] The video describes how to determine which addition fact is related to the given addition problem. The video uses vocabulary of addends and sum. The video is...
CK-12 Foundation
Ck 12: Addition and Subtraction of Liters Applications (Grade 3)
[Free Registration/Login may be required to access all resource tools.] This learning module features three videos and a set of practice questions in which students solve word problems requiring either one-step or two-step addition...