Mi Math Standards
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Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.
Grade 1 » Operations & Algebraic Thinking » Represent and solve problems involving addition and subtraction.
Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
Grade 1 » Operations & Algebraic Thinking » Understand and apply properties of operations and the relationship between addition and subtraction.
Understand subtraction as an unknown-addend problem. For example, subtract 10 - 8 by finding the number that makes 10 when added to 8.
Grade 1 » Operations & Algebraic Thinking » Add and subtract within 20.