## ◂Math Worksheets and Study Guides Second Grade. Subtraction is not Commutative

### The resources above correspond to the standards listed below:

#### Minnesota Academic Standards

MN.2.1. Number & Operation
2.1.1. Compare and represent whole numbers up to 1000 with an emphasis on place value and equality.
2.1.1.1. Read, write and represent whole numbers up to 1000. Representations may include numerals, addition, subtraction, multiplication, words, pictures, tally marks, number lines and manipulatives, such as bundles of sticks and base 10 blocks.
2.1.2. Demonstrate mastery of addition and subtraction basic facts; add and subtract one- and two-digit numbers in real-world and mathematical problems.
2.1.2.1. Use strategies to generate addition and subtraction facts including making tens, fact families, doubles plus or minus one, counting on, counting back, and the commutative and associative properties. Use the relationship between addition and subtraction to generate basic facts.
2.1.2.2. Demonstrate fluency with basic addition facts and related subtraction facts.
2.1.2.5. Solve real-world and mathematical addition and subtraction problems involving whole numbers with up to 2 digits.