Curso 2015/16

Comenzamos un nuevo curso llenos de energia!!!

Práctica de álgebra

ÁLGEBRA

ÁLGEBRA 2

ÁLGEBRA 3

ÁLGEBRA 4

Los dos primeros enlaces tienen actividades de álgebra de suma y resta.

Álgebra 3 y 4, tienen actividades de división y multiplicación.

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Conversión de temperatura

Conversion of Temperature

Quick Celsius (°C) / Fahrenheit (°F) Conversion: Conversion Tool Just type a value in either box: °C:    <=>   °F:  Or use the Interactive Thermometer, Or this method: °F to °C Deduct 32, then multiply by 5, then divide by 9 °C to °F Multiply by 9, then divide by 5, then add 32 (Explanation Below ...)

Typical Temperatures

°C	°F	Description
100	212	Water boils
40	104	Hot Bath
37	98.6	Body temperature
30	86	Beach weather
21	70	Room temperature
10	50	Cool Day
0	32	Freezing point of water
-18	0	Very Cold Day
-40	-40	Extremely Cold Day (and the same number!)
(bold are exact)

Explanation

There are two main temperature scales:

°F, the Fahrenheit Scale (used in the US), and
°C, the Celsius Scale (part of the Metric System, used in most other countries)

They both measure the same thing (temperature!), but use different numbers:

• Boiling water (at normal pressure) measures 100° in Celsius, but 212° in Fahrenheit
• And as water freezes it measures 0° in Celsius, but 32° in Fahrenheit

Like this:

Looking at the diagram, notice:

• The scales start at a different number (0 vs 32), so we will need to add or subtract 32
• The scales rise at a different rate (100 vs 180), so we will also need to multiply

And this is how it works out:

To convert from Celsius to Fahrenheit, first multiply by 180/100, then add 32

To convert from Fahrenheit to Celsius, first subtract 32, then multiply by 100/180

Note: 180/100 can be simplified to 9/5, and likewise 100/180=5/9, so this is the easiest way:

°C to °F	Multiply by 9, then divide by 5, then add 32
°F to °C	Deduct 32, then multiply by 5, then divide by 9

We can write that as a formula like this:

Celsius to Fahrenheit	(°C × 9/5) + 32 = °F
Fahrenheit to Celsius	(°F - 32) x 5/9 = °C

Example: Convert 26° Celsius (a nice warm day) to Fahrenheit

First: 26° × 9/5 = 234/5 = 46.8
Then: 46.8 + 32 = 78.8° F

Example: Convert 98.6° Fahrenheit (normal body temperature) to Celsius

First: 98.6° - 32 = 66.6
Then: 66.6 × 5/9 = 333/9 = 37° C

 

Other Methods That Work

Use 1.8 instead of 9/5

9/5 is equal to 1.8, so you could also use this method:

Celsius to Fahrenheit:	°C × 1.8 + 32 = °F
Fahrenheit to Celsius:	(°F - 32) / 1.8 = °C

To make "×1.8" easier you can multiply by 2 and subtract 10%, but it only works for °C to °F:

Celsius to Fahrenheit:

(°C × 2) less 10% + 32 = °F

Example: Convert 20° Celsius (A nice day) to Fahrenheit

• 20x2 = 40
• less 10% is 40-4 = 36
• 36+32 = 68° F

Add 40, Multiply, Subtract 40

Since both scales cross at -40° (-40° C equals -40° F) you can:

• add 40,
• multiply by 5/9 (for °F to °C), or 9/5 (for °C to °F)
• subtract 40

Example: Convert 10° Celsius (A cool day) to Fahrenheit

• 10+40 = 50
• 50×9/5 = 90
• 90-40 = 50° F

To remember 9/5 for °C to °F think "F is greater than C, so there are more °F than °C"

Quick, but Not Accurate

Celsius to Fahrenheit:	Double, then add 30
Fahrenheit to Celsius:	Subtract 30, then halve

Examples °C → °F:

• 0° C → 0+30 → 30° F (low by 2°)
• 10° C → 20+30 → 50° F (exact!)
• 30° C → 60+30 → 90° F (high by 4°)
• 180° C → 360+30 → 390° F (high by 34°, not good)

Examples °F → °C:

• 40° F → 10/2 → 5° C (almost right)
• 80° F → 50/2 → 25° C (low by about 2°)
• 120° F → 90/2 → 45° C (low by about 4°)
• 450° F → 420/2 → 210° C (low by about 22°, not good)

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Cookies & Carols 2013

Cookies and Carols 2013

Exponents

Exponents 1

Exponents 2

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Flipped math lesson

Fractions: mixed numbers facts

Adding mixed numbers

Subtracting mixed numbers

Multiplying mixed numbers

Dividing mixed numbers

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Lectura 4th grado

Viva Ramona!

Papá cuenta una historia a Chita

Coyote acomoda las estrellas

Los pájaros de la cosecha

Lon Po Po

Que ruido

El poni de Leah

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Un pueblo en auge

Helado de chocolate

Si ganaras un millón

Yo estoy a cargo de...

El regalo de Alejandro

Ecología para niños

El armadillo de Amarillo

Visitantes del espacio

Campeonas

En nuestra clase de 5th grado, tenemos auténticas campeonas en distintas disciplinas deportivas, como por ejemplo Alaina S. y Christine K. en natación, y Jacquelyn P. en gimnasia, entre otros. Gracias a estas fotos, podemos hacernos una idea de los logros conseguidos por estas fantásticas deportistas. Si siguen entrenando y trabajando duro, ¿quién sabe? quizás algún día podamos verlos el los Juegos Olímpicos.