Addition and Subtraction ~ Complete the Equation Free!

This app is designed to help students master the following Common Core Math Standards:CCSS.MATH.CONTENT.1.OA.B.3 - Apply properties of operations as strategies to add and subtract.2 Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) Also available-Comparing Numbers ~ Greater Than, Less Than, or Equal-Comparing Decimals ~ Greater Than, Less Than, or Equal-True or False Math Equations-Reading Comprehension Passages with Multiple Choice Questions ~ Guided Reading Level C-Reading Comprehension Passages with Multiple Choice Questions ~ Guided Reading Level D-Spanish Reading Comprehension Level 3