Fractions

Question 1

Basic fractions’ properties

Answer 1

I. Fractions with denomenator of 1 is equal to the numerator [n/1=n];
II. There are no fractions with zero in the denominator;
III. n/n = 1;
IV. Reciprocals: a/b -> b/a,
The product of any reciprocals is 1

Question 2

Properties of operations with fractions

Answer 2

V. Fractions can be split by addition or subtraction in the numerator but not in the denominator;
VI. Complex fractions can be simplified by the strategic of multiplication (by every denominator) and division.

Question 3

Cancellation rules in fraction equation (proportion)

Answer 3

We can cancel:
- factors in the numerator and the denominator of one fraction (vertical cancellation);
- factors in the 2 numerators on opposite sides (horizontal cancellation);
factors in the 2 denominators on opposite sides (horizontal cancellation).

Question 4

First step when adding or substracting fractions

Answer 4

Get a common denominator

Question 5

How to multiply fractions

Answer 5

Always cancel before you multiply.
Numerator is multiplied by a numerator and denominator by a denominator.

Question 6

How to divide by a fraction

Answer 6

To devide by a fraction we multiply by its reciprocal.
Ты НЕ МОЖЕШЬ переворачивать любое из чисел. Переворачивается ТОЛЬКО делитель.
https://youtu.be/Muk2Y7LoQCE