Calculating With Upper & Lower Bounds | Number | Maths | FuseSchool

Calculating With Upper & Lower Bounds | Number | Maths | FuseSchool

In this video we are going to look at how to calculate with upper and lower bounds.

To find the upper bound of an addition or of an area, you would want to multiply the upper bounds of both measurements, as this would give the largest possible sum / area. Whereas to get the lower bound of a addition or multiplication (such as area) you would multiply the lower bounds of both measurements.

For subtraction we need to think a little more carefully. To get the upper bound of a subtraction, you would want to take the upper bound of the first measurement and subtract the lower bound of the second, to give the largest possible outcome. Whereas to get the lower bound of a subtraction you would want to take a big value (upper bound second value) away from the smallest possible value (lower bound first value).

We also need to think more carefully about division. To get an upper bound answer, we would want to divide a big number (upper bound) by a small number (lower bound). Whereas a lower bound division would be the opposite; divide a small number (lower bound) by the biggest possible value (upper bound).

CREDITS
Animation & Design: Martin Mukhanu
Narration: Lucy Billings
Script: Lucy Billings

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[ahmeddhafar]

this basically summed up 7 lessons of math at my school and you still explained it betted, keep it up

[thisisjad]

you explained this better than my math teacher... thanks! got my sub for sure.

[williamiqbal]

I’m a bit confused for part a 75kg to the nearest 10 kgs so wouldn’t the lower bound be 70 because 10/2 is 5 and 75-5 is 70??

[Kanchou_]

Very helpful! I sometimes got confused with how it works 👍

[shs_iyadg]

Wow this helped much you gained a sub for sure

[xoticpenguin]

First, btw I love ur channel it always helps me ❤️

[menensa]

Great video.
Though, the solutions to the last questions/examples don't seem to match the explanations.

[amrfawzi]

I legitimately had more trouble rounding the numbers than calculating the bounds 😂😂

[mathafulsite]

A few other corrections are needed: eg. the phrase "to the decimal places" is vague. Also last example should be 65/4.25

[vaidehinavle]

hey!
just had a doubt.
at 1:18 it's given that we must divide upper bound of A by lower bound of B; however at 1:48 - the b one... the formula don't seem to match. It's wrong, right?

Anyways great help by the rules sheet.

[shanzayshamoon]

A simple advice
Please do recheck your sums when you upload them, I have some doubts that some of them are wrong . Another advice I'd like to add is if you could deepen the method of solving it . Regards a fellow watcher.

[mathafulsite]

At time 0:34, shouldn't it be 110+5m and 70+5m to match the spoken info?

[bashirabdirizak]

Plz do a tutorial for vectors mathematics

[ZAH]

they never told me that something minus something either has a upper or lower bound, I just considered it al as upper or lower, and thats how i got the questions wrong

[zayne]

Yea...so I wanted to ask this question about how did my sir got the 1/2=0.5 and in the next question he had 1/2=0.05
Edited: he then did the given amount with it ( plus, minus etc) like it was a formula

[XzSkull]

she is wearing the same clothes in the 2017 video too