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K-5 Grado 3 Unit 7 Lesson 8

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IM 6-8 Math
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Lesson 8

Warm-up Activity 1 Activity 2

Unit 7, Lesson 8

Encontremos el perímetro

Grado 3

Warm-up

Conversación numérica: Dividendo que disminuye

Encuentra mentalmente el valor de cada expresión.

Activity 1

Maneras de encontrar el perímetro

¿Qué observas? ¿Qué te preguntas?

Encuentra el perímetro de cada figura. Explica o muestra tu razonamiento.

Activity 2

Falta algo

Encuentra el perímetro de este rectángulo. Explica o muestra tu razonamiento.
Todos los lados cortos de esta figura tienen la misma longitud y todos los ángulos son ángulos rectos. Encuentra el perímetro de la figura. Explica o muestra tu razonamiento.
Todos los lados de este octágono tienen la misma longitud. Encuentra el perímetro del octágono. Explica o muestra tu razonamiento.

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Standards Alignment

Building On

Addressing

3.OA.7

Fluently multiply and divide within 100, using strategies such as the relationship between multiplication and division (e.g., knowing that 8 × 5 = 40, one knows 40 ÷ 5 = 8) or properties of operations. By the end of Grade 3, know from memory all products of two one-digit numbers.

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Standards Alignment

Building On

Addressing

3.MD.8

Solve real world and mathematical problems involving perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the same area and different perimeters.

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Standards Alignment

Building On

Addressing

3.MD.8

Solve real world and mathematical problems involving perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the same area and different perimeters.

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