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K-5 Grado 3 Unit 3 Lesson 8

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•K-5 Math 6-8 Math 9-12 Math

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Kínder Grado 1 Grado 2 •Grado 3 Grado 4 Grado 5

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Unit 1 Unit 2 •Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8

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Lesson 1 Lesson 2 Lesson 3 Lesson 4 Lesson 5 Lesson 6 Lesson 7 •Lesson 8 Lesson 9 Lesson 10 Lesson 11 Lesson 12 Lesson 13 Lesson 14 Lesson 15 Lesson 16 Lesson 17 Lesson 18 Lesson 19 Lesson 20 Lesson 21

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IM K-5 Math
IM 6-8 Math
IM 9-12 Math

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Lesson 8

Warm-up Activity 1 Activity 2

Unit 3, Lesson 8

Algoritmos de resta (parte 1)

Grado 3

Warm-up

Encuentra mentalmente el valor de cada expresión.

Activity 1

Jada y Kiran encontraron, cada uno, el valor de . Este es su trabajo.

El dibujo de Jada

Student representation of a base ten diagram with 3 hundreds, 2 crossed out, 9 tens with 2 crossed out with arrow pointing to 1 ten with 4 crossed out and a one, crossed out.

El algoritmo de Kiran

<p>Subtraction. Three-hundred plus ninety plus one, minus two-hundred plus ten plus five.</p>

Explica cómo empieza el algoritmo de Kiran.
Explica de qué manera Kiran registró la descomposición de 1 decena en más unidades.
Termina el trabajo de Kiran.

Activity 2

Tu profesor te va a dar varias tarjetas. Empareja cada diagrama con un algoritmo. Prepárate para explicar tu razonamiento.