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Grade 2: Operations and Algebraic Thinking

337 preguntas21 habilidades

2.OA.B.2

138 preguntas6 habilidades
Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.

2.OA.C.3

12 preguntas1 habilidad
Determine whether a group of objects (up to 20) has an odd or even number of members, e.g., by pairing objects or counting them by 2s; write an equation to express an even number as a sum of two equal addends.

2.OA.C.4

30 preguntas2 habilidades
Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends.