How to describe real-world situations with inequalities | 6th grade | Khan Academy

Learn how to write inequalities to model real-world situation.

Grade 6th on Khan Academy: By the 6th grade, you're becoming a sophisticated mathemagician. You'll be able to add, subtract, multiply, and divide any non-negative numbers (including decimals and fractions) that any grumpy ogre throws at you. Mind-blowing ideas like exponents (you saw these briefly in the 5th grade), ratios, percents, negative numbers, and variable expressions will start being in your comfort zone. Most importantly, the algebraic side of mathematics is a whole new kind of fun! And if that is not enough, we are going to continue with our understanding of ideas like the coordinate plane (from 5th grade) and area while beginning to derive meaning from data! (Content was selected for this grade level based on a typical curriculum in the United States.)

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[frankwood]

The above video might be a real world situation but it does not have any personal relevance. Whilst it’s fun and sometimes challenging to fiddle around with inequalities I really would like to see some real world examples of people’s experience of inequalities and how they applied the rules to solve a problem affecting them. Examples such as “maths helped to put a someone on the moon” is too vague, it doesn’t motivate.

I posted a little while ago a problem I had. I wanted to put some chicken in to marinade but not sure whether a rectangular basin I had or a cylindrical tub had the greatest volume. The maths was simple but that’s not the point. The point is that the problem was relevant to me, not some vague notion like the video above.

Does anyone have experiences with inequalities or any others maths in the real world?

[WoftheAUC]

Testing this on my mum to see if she realize what I'm watching. So far she did not realize.