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: 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: Sums of Whole Numbers to 1000 (Grade 4)
[Free Registration/Login may be required to access all resource tools.] Use addition to find the sum or summand of numbers up to 1000. It includes how to videos with an overview, selecting the correct and incorrect sentence, and adding...