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Rule of Three: Exercises
Extra exercises on the rule of three supplemented with an improvement key. This covers:
- cost accounting,
- percent calculation.
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Elections 2024: Learning path
Book widget about the elections where students can look up most answers online or in the Elections 2024 brochure: #zozitdat (can be ordered or downloaded online here ).
Students need approximately two hours of lessons to complete the Book widget.
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Inverse function: Exercises
BookWidgets exercises on calculating the inverse function of a first or second degree function.
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Typing lessons online
Typing lessons online is a free typing course for young and old. You learn to touch type with 10 fingers. Various keyboard layouts and color schemes are available.
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Design dinosaur games with Zimjs
In this presentation you will learn more about how to design a dinosaur game with ZimJs code, such as the well-known Chrome Dino game. You will also find a video tutorial on how to design such a game in Octostudio.
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Corners in a quadrilateral
Sum of the four angles in a quadrilateral is 360 degrees. Calculate the size of an angle, based on three given angles.
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Sine function
Elements of the sine function: amplitude, equilibrium line and period. You receive a job description and get the requested information from it.
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Working out squares with remarkable products
Calculate the following squares using the rule of remarkable products.
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Proportions
An exercise on solving proportions: a/b = c/d means ad = bc.
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Distributivity in multiplication
Working out multiplications using distributivity: e.g. 31x11 = (30+1)x(10+1) = 300 + 30 + 10 + 1 = 341.
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Square roots of natural numbers
This exercise is about square roots of natural numbers, which have a natural number as a solution.
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Smoker face
This app uses a selfie to show what your face would look like if you smoked. The negative consequences of smoking are shown on your own face. Useful for smoking prevention and to encourage people to quit smoking.
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