Natural human interest in patterns and algebraic study of function notation are linked in this introductory unit on the properties of sequences. Once presented with a pattern or situation, the class works through how to justify...

[Free Registration/Login may be required to access all resource tools.] The resource is a video showing students how to find a missing number in a multi-step addition and subtraction problem using inverse operations. Adaptive practice...

This website explains and defines basic subtraction. There are practice problems at the very end of this lesson.

[Free Registration/Login may be required to access all resource tools.] The resource includes a video tutorial on how to find a missing number in a multi-operational problem by working backwards. The video is followed by practice...

[Free Registration/Login may be required to access all resource tools.] A learning module where students must apply the order of operations to find the missing numbers in equations involving addition, subtraction, and multiplication. A...

Practice finding the missing value in an addition or subtraction equation involving negative numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

[Free Registration/Login may be required to access all resource tools.] The video shows how to finding the missing number in a two-digit subtraction problem by working backwards. The video is followed by a series of practice questions to...

[Free Registration/Login may be required to access all resource tools.] In this learning module, students are shown a subtraction sentence with numbers up to 1000 and must fill in a missing number. An accompanying video demonstrates the...

[Free Registration/Login may be required to access all resource tools.] The video describes how to determine what number sentence is missing in the fact family.

[Free Registration/Login may be required to access all resource tools.] The video shows how to determine the missing number sentence by using fact families.

[Free Registration/Login may be required to access all resource tools.] The video shows how to find a pattern in a series of subtraction problems to determine the missing problem in the set. The video is followed by additional problems...

[Free Registration/Login may be required to access all resource tools.] This is a video and practice problems demonstrate finding missing numbers using order of operations and working backwards. Operations include addition, subtraction,...

[Free Registration/Login may be required to access all resource tools.] The video works through 2-digit addition and subtraction problems to determine which number sentence coincides with the given value. The video is followed by...

[Free Registration/Login may be required to access all resource tools.] The video shows how to use a model to determine the missing number in a subtraction problem. The video is followed by practice problems to assess student...

[Free Registration/Login may be required to access all resource tools.] The video describes how to work backwards working with 3-digit numbers to determine what number is missing in the subtraction sentence. The video is followed by...

[Free Registration/Login may be required to access all resource tools.] The video describes how to work backwards working with 3-digit numbers to determine what number is missing in the subtraction sentence. The video is followed by...

[Free Registration/Login may be required to access all resource tools.] The video describes how to fill in a missing number in a 2-digit subtraction sentence. The video is followed by practice problems to assess student understanding of...

[Free Registration/Login may be required to access all resource tools.] The video shows how to use addition and subtraction to keep an equation balanced by working backwards to determine the missing value. The video is followed by...

[Free Registration/Login may be required to access all resource tools.] The video works through a 3-digit addition problem to determine if the correct operation for the number sentence is addition or subtraction. The video is followed by...

[Free Registration/Login may be required to access all resource tools.] The video shows how to determine the missing number sentence when adding and subtracting 3-digit numbers by using fact families.

[Free Registration/Login may be required to access all resource tools.] This is a set of practice problems where students solve addition and subtraction problems in order to determine missing numbers to keep the equation balanced. When...