Shapes and Their Attributes Topic - pearsoncmg.commediaconsole.pearsoncmg.com/curriculum/math/ma... · Las figuras y sus atributos Tema 15 Estándares del Tema 15 2.OA.C.4, 2.G.A.1,
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Shapes and Their Attributes Topic 15 Standards 2.OA.C.4, 2.G.A.1, 2.G.A.2, 2.G.A.3 See the front of the Student’s Edition for complete standards.
Dear Family,
Your child is learning to identify and draw two-dimensional shapes and three-dimensional cubes. He or she will use vocabulary associated with these shapes. Your child will also partition a rectangle into rows and columns of equal-sized squares and count to find the total number of squares, as shown below. This is an important foundation skill and used when finding the area of rectangles.
You can count and add the number of squares that cover this rectangle in different ways.
Have your child cut out a small rectangle like the one above from a piece of grid paper. Then ask your child to count the number of squares by rows and by columns. Help your child see that the total number of squares is the same using either way. Repeat the process several times after having your child cut out rectangles of different shapes and sizes. Challenge him or her to write addition equations that show the number of squares by rows and by columns.
Observe Your ChildFocus on Mathematical Practice 8 Look for and express regularity in repeated reasoning.
Help your child become proficient with Mathematical Practice 8. Ask your child to explain how counting squares by rows or by columns repeatedly is a shortcut for counting them individually.
Las figuras y sus atributosEstándares del Tema 152.OA.C.4, 2.G.A.1, 2.G.A.2, 2.G.A.3 Los estándares completos se encuentran en las páginas preliminares del Libro del estudiante.
Estimada familia:
Su niño(a) está aprendiendo a identificar y dibujar figuras bidimensionales y cubos tridimensionales. Usará el vocabulario asociado con estas figuras. También dividirá un rectángulo en filas y columnas de cuadrados del mismo tamaño y contará para hallar el número total de cuadrados, como se muestra a continuación. Esta es una base importante que se usa cuando se halla el área de los rectángulos.
Se puede contar y sumar el número de cuadrados que cubren este rectángulo de diferentes maneras.
Pídale a su niño(a) que recorte un rectángulo pequeño, como el que se muestra arriba, de un pedazo de papel cuadriculado. Luego, pídale que cuente el número de cuadrados por filas y por columnas. Ayude a su niño(a) a ver que el número total de cuadrados es el mismo con cualquier método. Repita el proceso varias veces después de pedirle a su niño(a) que recorte rectángulos de diferentes formas y tamaños. Anímelo(a) a escribir ecuaciones de suma que muestren el número de cuadrados por filas y por columnas.
Observe a su niño(a)Enfoque en la Práctica matemática 8 Buscar y expresar uniformidad en los razonamientos repetidos.
Ayude a su niño(a) a adquirir competencia en la Práctica matemática 8. Pídale que le explique por qué contar los cuadrados por filas o por columnas es más rápido que contarlos individualmente.
Name Math and Science Activity15-3Building with Shapes
Did You Know? Houses are made up of different shapes. A triangle can be used to make a slanted roof. Water flows better off a slanted roof.
1 Follow these instructions to draw a house.
• Draw the front of the house. It will be a polygon with 5 vertices.• Draw a 4-sided door with opposite sides the same length. • Draw 2 windows, one on both the left and the right sides of the door.
Each window is a polygon with 4 sides that are the same length.• Draw another window with 3 vertices over the door.
2 Name the polygon you drew for each part of the house.
Front: Door:
Windows on the left and right Window above sides of the door: the door:
3 Extension Use shapes to draw another house on the back of this paper. Trade drawings with a partner. Describe and name the shapes in your partner’s drawing.
Did You Know? Blocks, ice, and boxes can be in the shape of a cube. The shape of a cubic block lets you stack and build with it. Each time you toss a number cube, one of the 6 numbers will be on the top face.
1 Naomi has a number cube. Complete each description of a number cube.
The number cube is a figure.
It has faces. It has edges.
It has vertices.
Each face of the number cube is a .
2 Describe two more features that you know about a cube.
3 Use the dot paper to draw a cube. Use dashed lines to show the edges that you can’t see.
4 Extension Find an object in the shape of a cube at home or at school. Draw the object. Explain why a cube is a good shape for the object.
Start Get 4 5 6 7 8 9 . Get 10 red squares. Work together.
Try Choose a rectangle. Estimate the number of red squares needed to cover the rectangle. Use squares to find this number. Count the squares in rows. Use a number tile to show this number.
Try Again Talk about objects in your classroom that you can measure with the red squares. Estimate the number of squares needed to cover them.
Start Get 12 red squares. Cover each game space with a square. Take turns.
Try Uncover two game spaces. Do you see one divided shape and the word Equal or Unequal?
If you do, keep the squares if the word describes the shares. If the word does not describe the shares, tell why and put the squares back where they were. If you do not uncover one divided shape and one word, put the squares back where they were.