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.
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: 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: 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...
CK-12 Foundation
Ck 12: Elem Math: Selecting the Correct Addition Sentence
[Free Registration/Login may be required to access all resource tools.] This video describes how to find the addition problem that does fit for the solution given in the question. The video is followed by a series of practice questions...
CK-12 Foundation
Ck 12: Elem Math: Completing the Addition Sentence Sums to 20
[Free Registration/Login may be required to access all resource tools.] The video shows how to count backwards to determine the missing number in an addition problem. The video is followed by practice problems to assess student...
CK-12 Foundation
Ck 12: Elem Math: Overview of Addition Sums to 100 Word Problems
[Free Registration/Login may be required to access all resource tools.] The video explains two addition problems one with regrouping and the other without regrouping.