Question

3/5-1/8. 8/11-2/5 4/5-7/12. 7/8-5/9

Answer 1

Ответ:

3/5-1/8=24/40-5/40=19/40

8/11-2/5=40/55-22/55=18/55

4/5-7/12=48/60-35/60=13/60

7/8-5/9=63/72-40/72=23/72

Answer 2

To subtract fractions, you need to have a common denominator. Let's find the common denominator for each pair of fractions and then perform the subtraction:

1. $\frac{3}{5} - \frac{1}{8}$:

To find a common denominator, you can use 40, which is the least common multiple of 5 and 8. Now, rewrite both fractions with a denominator of 40:

$\frac{3 \cdot 8}{5 \cdot 8} - \frac{1 \cdot 5}{8 \cdot 5}$

$\frac{24}{40} - \frac{5}{40}$

Now, subtract the fractions:

$\frac{24 - 5}{40} = \frac{19}{40}$

2. $\frac{8}{11} - \frac{2}{5}$:

To find a common denominator, you can use 55, which is the least common multiple of 11 and 5. Now, rewrite both fractions with a denominator of 55:

$\frac{8 \cdot 5}{11 \cdot 5} - \frac{2 \cdot 11}{5 \cdot 11}$

$\frac{40}{55} - \frac{22}{55}$

Now, subtract the fractions:

$\frac{40 - 22}{55} = \frac{18}{55}$

3. \frac{4/5 - 7/12}:

To find a common denominator, you can use 60, which is the least common multiple of 5 and 12. Now, rewrite both fractions with a denominator of 60:

$\frac{4 \cdot 12}{5 \cdot 12} - \frac{7 \cdot 5}{12 \cdot 5}$

$\frac{48}{60} - \frac{35}{60}$

Now, subtract the fractions:

$\frac{48 - 35}{60} = \frac{13}{60}$

4. \frac{7/8 - 5/9}:

To find a common denominator, you can use 72, which is the least common multiple of 8 and 9. Now, rewrite both fractions with a denominator of 72:

$\frac{7 \cdot 9}{8 \cdot 9} - \frac{5 \cdot 8}{9 \cdot 8}$

$\frac{63}{72} - \frac{40}{72}$

Now, subtract the fractions:

$\frac{63 - 40}{72} = \frac{23}{72}$

So, the results of the subtraction are:

1. $\frac{3}{5} - \frac{1}{8} = \frac{19}{40}$
2. $\frac{8}{11} - \frac{2}{5} = \frac{18}{55}$
3. $\frac{4}{5} - \frac{7}{12} = \frac{13}{60}$
4. $\frac{7}{8} - \frac{5}{9} = \frac{23}{72}$