Los números.

Presentación del tema: "Los números."— Transcripción de la presentación:

1 Los números

2 ¿Cuántas maneras conocemos de escribir los números?
1, 2, 3 Los números árabes XVI Los números romanos Los “hash marks”

3 + = + = + = + = ? ? Los números mayas
= = = ? Have students study the first two examples and come up with the value for a dot (1) and a bar (5). Then have them solve the next two problems, writing their answers in bar and dot notation. = ?

4 ¿Qué número es? 16 7 6 Look at these examples of Maya glyphs. What numbers do you see? (Note that there are some curved shapes that resemble dots, but they are in fact just designs to fill the space.) 18 4

5 = = ? Have students study the first math problem and figure out what the single dot up above represents. Then see if they can solve the other two problems in Maya notation. (The Maya system depended on placement to determine value, just as ours does. Once 4 bars (20) are accumulated on the lower level, they move to the next level as one dot, which is worth 20.) = ?

6 + = ? 23 30 53 _____ + _____ = ____ X 20 X 1
= X 20 ? X 1 23 30 53 _____ _____ = ____ Have students solve this problem in Maya notation, and then convert it to Arabic numbers.

7 + = ? 364 237 601 _____ + _____ = ____ X 400 (20 x 20) X 20 X 1
= X 400 (20 x 20) X 20 ? X 1 Students should be able to use what they have learned to figure out that the next highest place has a value of the previous level times 20, or in this case 400. 364 237 601 _____ _____ = ____

8 ¿Qué número es? Have students determine the value of these numbers. 327 502 829 8,191 16,721

9 Winal = un período de 20 días Winik = “persona”
En la lengua maya la palabra para el número 20 es la palabra para persona The Maya system is similar to ours except that it is a base-20 system instead of base-10. Winal = un período de 20 días Winik = “persona” PD Clipart: clker.com

10 Photos: Lynn Fernandez
el fin Photos: Lynn Fernandez