Question

8 1/12 - 3 4/15 - 1 7/30

Answer 1

Ответ:

1) 8 1/12 - 3 4/15= 8 5/60- 3 16/60= 7 65/60- 3 16/60= 4 49/60

2) 4 49/60 - 1 7/30= 4 49/60- 1 14/60 = 3 35/60

ответ: 3 35/60

Answer 2

Ответ: 3 7/12

Пошаговое объяснение:

8 1/12 - 3 4/15 - 1 7/30=(8-3-1)+(1/12-4/15-7/30)=4+(5×1-4×4-7×2) /60=4+ (-25/60)=4+ (-5/12)=3+12/12-5/12=3+7/12=3 7/12

Answer 3

To subtract mixed numbers, you can follow these steps:

1. Convert each mixed number to an improper fraction.
2. Subtract the fractions.
3. Simplify the result if necessary.

Let's apply these steps to the given problem:

1. Convert the mixed numbers to improper fractions:

   8 1/12 = 8 + 1/12 = 97/12 3 4/15 = 3 + 4/15 = 49/15 1 7/30 = 1 + 7/30 = 37/30

2. Subtract the fractions:

   (97/12) - (49/15) - (37/30)

3. To subtract these fractions, you need a common denominator. The least common multiple (LCM) of 12, 15, and 30 is 60. So, you'll need to rewrite each fraction with a denominator of 60:

   • (97/12) = (97/12) * (5/5) = 485/60
   • (49/15) = (49/15) * (4/4) = 196/60
   • (37/30) = (37/30) * (2/2) = 74/60

Now, subtract the fractions with the common denominator:

(485/60) - (196/60) - (74/60) = (485 - 196 - 74) / 60

Now, calculate the numerator:

(485 - 196 - 74) = 215

So, the result is:

215/60

You can simplify this fraction by dividing both the numerator and denominator by their greatest common divisor (GCD), which is 5:

(215/5) / (60/5) = 43/12

So, the final answer is:

43/12