matesytic@gmail.com, Mates y TIC, maths and ITC
Today we start a bit differently, with a game:
Take a screenshot at the end of this part.
And another one:
2. MathHeads | A Fun Mental Maths Game
Same thing, send me a screenshot.
Now it´s time for some Cayetano problems:
3. Proporcionalidad Directa e inversa. Regla de Tres – GeoGebra
4. Proporcionalidad Compuesta – GeoGebra
Some exercises for next week:
Hi, today we start as usual:
1. https://chemarias.com/cm/tabla/index.html. Three attempts and one screenshot.
2. https://mathster.com/10secondsmaths/ . Use the operations + – * /. Five minutes and one screenshot.
But continue as follows:
5. Exercises from this pdf (Answer in your notebook):
Page 315: 1 to 4
Page 316: 5 t0 9
Page 317: 11 to 15
Page 318: 16 to 25
Pages 321 and 322: 60, 61 and 62, 67, 68 and 69.
https://www.ncert.nic.in/pdf/publication/exemplarproblem/classVIII/mathematics/heep210.pdf
And now, some liveworksheets:
6. Direct Proporti… | Free Interactive Worksheets | 1854770
7. https://www.liveworksheets.com/worksheet/en/math/1665090
Bonus videos:
Hi, today we start as usual:
1. https://chemarias.com/cm/tabla/index.html. Three attempts and one screenshot.
2. https://mathster.com/10secondsmaths/ . Use the operations + – * /. Five minutes and one screenshot.
But continue as follows:
5. Exercises from this pdf (Answer in your notebook):
Page 315: 1 to 4
Page 316: 5 t0 9
Page 317: 11 to 15
Page 318: 16 to 25
Pages 321 and 322: 60, 61 and 62, 67, 68 and 69.
https://www.ncert.nic.in/pdf/publication/exemplarproblem/classVIII/mathematics/heep210.pdf
And now, some liveworksheets:
6. Direct Proporti… | Free Interactive Worksheets | 1854770
7. https://www.liveworksheets.com/worksheet/en/math/1665090
Bonus videos:
Hi, today we start as usual, but only with this one:
1. https://chemarias.com/cm/tabla/index.html. Three attempts and one screenshot.
Today we start a new unit, proporcionality, in which the most important concepts are ratios and proportions. Here you have an article about them:
But we are going to use this clasroom to learn a bit about that with the help of Javier Cayetano:
Next one, the rule of three. First an explanation:
Rule of Three is a Mathematical Rule that allows you to solve problems based on proportions
And now, some exercises:
Percentages are an special case of proporcionality, quite common. Some exercises:
Hi, today we start as usual, I’ve seen some progress…
1. https://chemarias.com/cm/tabla/index.html. Three attempts and one screenshot.
2. https://mathster.com/10secondsmaths/ . Use the operations + – * /. Five minutes and one screenshot.
And then, the moment you were waiting for (J. Cayetano). 6 or 7 minutes each and don’t forget to send me screenshots.
3. One page to review the conversion thing:
https://www.geogebra.org/m/AsMKtWd4#material/UTEUv6zD
4. Finding how much is a part of a number:
https://www.geogebra.org/m/AsMKtWd4#material/DQYgb3g7
5. Finding the fraction:
https://www.geogebra.org/m/AsMKtWd4#material/h5vUPP28
6. And lastly, finding the total:
https://www.geogebra.org/m/AsMKtWd4#material/mK6jHHby
Bonus video:
And the story of Hippasus
Hi, as usual, mental calculations to warm up. Try to improve over the previous sessions:
1. https://chemarias.com/cm/tabla/index.html. Three attempts and one screenshot.
2. https://mathster.com/10secondsmaths/ . Use all the operations. Five minutes and one screenshot.
2. Some worksheets to solve, you can do the calculations in your notebook, and answer the question in the worksheet. Take a screenshot of your results:
a) https://www.liveworksheets.com/worksheet/en/math/2204003
b)https://www.liveworksheets.com/worksheet/en/math/2243372
c)https://www.liveworksheets.com/worksheet/en/math/684721
3. Another collection of word problems
Google doodle from Oct. 22, 2025.
Hi, today, as usual, we start with mental calculations. try to improve over the previous session:
1. https://chemarias.com/cm/tabla/index.html. Ten minutes and one screenshot.
2. Now we are going to use some applets from Javier Cayetano:
Mental calculations with fractions:
3. At last, calculations in your notebook (remember to simplify):
https://www.geogebra.org/m/AsMKtWd4#material/ZpJbaxeD
And some Geogebra resources:
https://www.geogebra.org/math/fraction-operations
1. Mental calculations:
a)Mental Math: first 5 minutes of the class, send me a screenshot.
b) https://chemarias.com/cm/tabla/index.html. Five minutes more and another screenshot.
2. Practice converting fractions into decimal numbers. It’s easy. Paste the exercises in a word document and write the answers there. This is the document (2 pages):
decimals-comp-packet (arrastrado)3. Now some problems, that you must paste and solve in the same document, writing all the operations (2 pages as well):
decimals-comp-packet (arrastrado) 24. Don’t forget to send me the word document at the end of the class.
Bonus videos:
