This joke strikes fear into the hearts of all mathematicians - mostly because they are afraid they are going to hear it again! Why was the number ten afraid? Because seven ate nine.

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Missing Addition or Subtraction Sign

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Basic Lesson: Students decide whether to use the addition or subtraction operator. Includes practice problems.; Standard: MATH 1
Grades: (K-2); View Worksheet

Intermediate Lesson: Uses a larger range of digits in the problems.; Standard: MATH 1
Grades: (K-2); View Worksheet

Independent Practice 1: Contains 20 problems asking for the operator needed to make it correct. The answers can be found below.; Standard: MATH 1
Grades: (K-2); View Worksheet

Independent Practice 2: Great as an introduction to pre-algebra skills. The answers can be found below.; Standard: MATH 1
Grades: (K-2); View Worksheet

Missing Addition or Subtraction Sign Homework: Another 12 problems for you. An example is provided.; Standard: MATH 1
Grades: (K-2); View Worksheet

Addition or Subtraction Sign Quiz: 10 Missing Addition or Subtraction Sign questions. Includes a scoring matrix.; View Worksheet

Lesson and Practice Answer Key: Answers for both Lessons and Independent Practice worksheets.; View Worksheet

Homework and Quiz Answer Key: Answers for the Addition or Subtraction Sign homework worksheet and quiz.; View Worksheet

10 Reasons Everyone Should Master Math: Math isn't at all as difficult as it seems. Sometimes we need to change our thinking.; View Math Article

Why Do We Use Symbols in Math?: Sometimes it is the little things that are the most important and you could lump mathematical symbols into this category.; View Math Article

More Advanced Math Worksheets

More Advanced Worksheets: The next level of math skills.; -Number Sentences to Pictures
-Simple Word Problems
-Estimate Large Sums
-Write the Missing Math Symbols

Less Advanced Math Worksheets

Remedial Math Worksheets: Skills needed to get to this level.; -Color Based On Directions
-Add/Subtract Word Problems
-Making Sums and Differences
-Estimate Sums and Differences