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Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Subtraction Complete the Subtraction Sentence

For Students 3rd - 5th
[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...
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Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Fact Families Numbers to 1000

For Students 3rd - 5th
[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.
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Interactive
Topmarks Online

Topmarks: Subtraction Grids

For Students 1st - 5th Standards
Can you meet the challenge to see how many subtraction calculations you can do in two minutes? There are different levels and you can choose either one or two missing numbers to make your number sentence correct.
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Whiteboard
SMART Technologies

Smart: Colorful Painter Fact Families

For Teachers 1st - 3rd
Find the missing numbers in the fact family number sentences.
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Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Filling in the Missing or Sign Numbers to 100

For Students 1st - 2nd
[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...
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Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Subtraction Complete the Subtraction Sentence

For Students 2nd - 4th
[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...
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Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Subtraction Complete the Subtraction Sentence

For Students 3rd - 5th
[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...
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Activity
Math Slice

Math Slice: Math Crossword Slice Special Test

For Students Pre-K - 1st Standards
Use this interactive math crossword puzzle to build number sense skills. Simply fill in the missing numbers based on the operation. Immediate feedback given to responses.
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Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Filling in the Missing or Sign Numbers to 1000

For Students 2nd - 4th
[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...
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Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Add and Subtract to 100 Mixed Operations and Word Problems

For Students 2nd - 4th Standards
[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...