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Understand that the two digits of a two-digit number represent groups of tens and ones. Understand the following as special cases: a. 10 can be thought of as a group of ten ones — called a “ten”. b. The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones. c. The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones).
Use addition and subtraction within 20 to solve word problems with unknowns in all positions (e.g., by using objects, drawings, and/or equations with a symbol for the unknown number to represent the problem).
Compose two-dimensional shapes or three-dimensional shapes to create a composite shape.
Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.
Distinguish between defining attributes (triangles are closed and 3 sided) versus non-defining attributes (color, orientation, overall size) for two-dimensional shapes; build and draw shapes that possess defining attributes.
1.OA.4 Understand subtraction as an unknown-addend problem within 20 (e.g., subtract 10 - 8 by finding the number that makes 10 when added to 8)
1.OA.5 Relate counting to addition and subtraction (e.g., by using counting on 2 to add 2).
1.OA.6 Fluently add and subtract within 10.
Arizona has fully implemented the Arizona College and Career Ready Standards (ACCRS). Arizona schools will administer the AzMERIT assessments to measure student proficiency of Arizona’s College and Career Ready Standards. Education Galaxy’s AzMERIT test preparation program provides online assessment and practice for students in Grades k-5 to help build mastery towards the ACCRS Standards. Our unique online program is easy to use and enjoyable for both teachers and students. Students work on their Study Plans practicing important concepts while teachers pull formative assessment reports to identify the strengths and weaknesses of their classroom and individual students.