Question

10,1/4-6,1/5=? 21,15/16-19,3/125=?

Answer 1

$10 \frac{1}{4} - 6 \frac{1}{5} = 10 \frac{5}{20} - 6 \frac{4}{20} = 4 \frac{1}{20}$
$21 \frac{15}{16} - 19 \frac{3}{125 } =$
Не знаю как решить

Answer 2

Let's solve each of the expressions step by step:

1. 10 1/4 - 6 1/5

Step 1: Convert the mixed numbers to improper fractions. 10 1/4 = (10 * 4 + 1) / 4 = 41 / 4 6 1/5 = (6 * 5 + 1) / 5 = 31 / 5

Step 2: Find a common denominator, which is the least common multiple (LCM) of 4 and 5, which is 20.

Step 3: Rewrite the fractions with the common denominator. 41 / 4 = (41 * 5) / (4 * 5) = 205 / 20 31 / 5 = (31 * 4) / (5 * 4) = 124 / 20

Step 4: Subtract the fractions. 205 / 20 - 124 / 20 = (205 - 124) / 20 = 81 / 20

So, 10 1/4 - 6 1/5 = 81 / 20.

2. 21 15/16 - 19 3/125

Step 1: Convert the mixed numbers to improper fractions. 21 15/16 = (21 * 16 + 15) / 16 = 351 / 16 19 3/125 = (19 * 125 + 3) / 125 = 2398 / 125

Step 2: Find a common denominator, which is the least common multiple (LCM) of 16 and 125, which is 2000.

Step 3: Rewrite the fractions with the common denominator. 351 / 16 = (351 * 125) / (16 * 125) = 43875 / 2000 2398 / 125 = (2398 * 16) / (125 * 16) = 38368 / 2000

Step 4: Subtract the fractions. 43875 / 2000 - 38368 / 2000 = (43875 - 38368) / 2000 = 5507 / 2000

Step 5: Simplify the fraction (if possible). The fraction 5507 / 2000 cannot be further simplified.

So, 21 15/16 - 19 3/125 = 5507 / 2000.