If you're seeing this message, it means we're having trouble loading external resources on our website.

Si estás detrás de un filtro de páginas web, por favor asegúrate de que los dominios *.kastatic.org y *.kasandbox.org estén desbloqueados.

Contenido principal

Grade 1: Operations and Algebraic Thinking

239 preguntas10 habilidades

1.OA.A.1

117 preguntas4 habilidades
Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

1.OA.A.2

20 preguntas1 habilidad
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.
Apply properties of operations as strategies to add and subtract.
 Pronto habrá nuevas habilidades para este estándar.

1.OA.B.4

20 preguntas1 habilidad
Understand subtraction as an unknown-addend problem.
Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).
 Pronto habrá nuevas habilidades para este estándar.

1.OA.C.6

42 preguntas2 habilidades
Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

1.OA.D.7

20 preguntas1 habilidad
Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false.

1.OA.D.8

20 preguntas1 habilidad
Determine the unknown whole number in an addition or subtraction equation relating three whole numbers.