Question

1)7 1/3-1/5-1 1/15 2)3 7/8-1 1/4-1/2 3) 4 7/9-1 2/3+1/6​

Answer 1

Ответ:

1) найдём НОК: 15

7 1/3=7 5/15

1/5=3/15

1 1/15= 1 1/15

вычислим:

7 5/15-3/15-1 1/15= 7 2/15- 1 1/15= 6 1/15

2) 3 7/8- 1 1/4-1/2

найдём НОК: 8

3 7/8= 3 7/8

1 1/4=1 2/8

1/2=4/8

вычислим:

3 7/8-1 2/8-4/8=2 5/8-4/8=2 1/8

3) 4 7/9-1 2/3+7 1/2

находим НОК: 126

4 7/9=4 98/126

1 2/3= 1 84/126

7 1/2= 7 63/126

вычислим:

4 98/126-1 84/126+7 63/126= 3 14/126+7 63/126=10 77/126=10 11/18

Пошаговое объяснение:

1) 6 1/15

2) 2 1/8

3)10 11/18

можно лучший ответ?

Answer 2

Sure, I'd be happy to help you with these arithmetic calculations:

1. $7 \frac{1}{3} - \frac{1}{5} - 1 \frac{1}{15}$ To subtract fractions, you need a common denominator. The least common multiple (LCM) of 3, 5, and 15 is 15.

Converting all fractions to have a denominator of 15: $7 \frac{1}{3} = 7 \frac{5}{15}$ $1 \frac{1}{15} = \frac{1}{15}$

Now, the expression becomes: $7 \frac{5}{15} - \frac{1}{5} - \frac{1}{15}$

Combine the fractions: $7 \frac{5}{15} - \frac{1}{5} - \frac{1}{15} = 7 \frac{4}{15} - \frac{1}{15}$

Finally, subtract: $7 \frac{4}{15} - \frac{1}{15} = 7 \frac{3}{15} = 7 \frac{1}{5}$

2. $3 \frac{7}{8} - 1 \frac{1}{4} - \frac{1}{2}$ Again, you need a common denominator. The LCM of 8 and 4 is 8.

Converting all fractions to have a denominator of 8: $3 \frac{7}{8} = 3 \frac{7}{8}$ $1 \frac{1}{4} = 1 \frac{2}{8}$ $1 \frac{1}{2} = 1 \frac{4}{8}$

Now, the expression becomes: $3 \frac{7}{8} - 1 \frac{2}{8} - 1 \frac{4}{8}$

Combine the fractions: $3 \frac{7}{8} - 1 \frac{2}{8} - 1 \frac{4}{8} = 3 \frac{7}{8} - 2 \frac{6}{8}$

Subtract: $3 \frac{7}{8} - 2 \frac{6}{8} = 1 \frac{1}{8}$

3. $4 \frac{7}{9} - 1 \frac{2}{3} + \frac{1}{6}$ Once again, you need a common denominator. The LCM of 9, 3, and 6 is 18.

Converting all fractions to have a denominator of 18: $4 \frac{7}{9} = 4 \frac{14}{18}$ $1 \frac{2}{3} = 1 \frac{12}{18}$ $\frac{1}{6} = \frac{3}{18}$

Now, the expression becomes: $4 \frac{14}{18} - 1 \frac{12}{18} + \frac{3}{18}$