Numerators
No, the denominators have to be the same.
If you are suggesting they add up to less than 180, this is impossible. If you are suggesting that each angle is less than 180, this is always the case.
It is easier to multiply or divide fractions than to add or subtract fractions because in multiplication, you just have to multiply the numerator by the numerator and the denominator by the denominator. Same applies with division of fractions, except that you have to reciprocate the fraction you're dividing with (divisor) then proceed to multiplication. Whereas, in addition and subtraction of fractions, you still have to get their Least Common Denominator (LCD).
In fractions, you can NEVER add or subtract
Numerators
Fractions! Otherwise you don't have anything to add.
To determine whether the sum of two fractions with a common denominator is greater than, less than, or equal to 1, you need to add the numerators of the fractions together and compare the result to the common denominator. If the sum of the numerators is greater than the denominator, the sum of the fractions will be greater than 1. If the sum of the numerators is less than the denominator, the sum of the fractions will be less than 1. If the sum of the numerators is equal to the denominator, the sum of the fractions will be equal to 1.
Proper fractions are less than 1. Improper fractions are greater than 1. For a proper fraction to become an improper fraction, you would have to add a quantity that would make it greater than 1.
No, the denominators have to be the same.
If you are suggesting they add up to less than 180, this is impossible. If you are suggesting that each angle is less than 180, this is always the case.
it stay the same when you subtract fractions and when you add fractions.
It is easier to multiply or divide fractions than to add or subtract fractions because in multiplication, you just have to multiply the numerator by the numerator and the denominator by the denominator. Same applies with division of fractions, except that you have to reciprocate the fraction you're dividing with (divisor) then proceed to multiplication. Whereas, in addition and subtraction of fractions, you still have to get their Least Common Denominator (LCD).
In fractions, you can NEVER add or subtract
there is no such thing as less than 1% but you always move the decimal over once to the right and i would guess that you add a negative sign if i were you.
Change them into mixed numbers and add the integers and fractions together ensuring that the fractions have a common denominator.
Yes. An acute triangle has three angles that individually are less than 90 degrees. Remember you can add the internal angles together in a triangle and they will always add up to 180 degrees.