Question

-2 3/8+(-1 1/4) =? -48,72:12=? (2-3/4-4/5)*20=? -18*(1/3-1/9)=?

Answer 1

Ответ:

1)-5 1/8 или 5.125

2)-4.06

3)5/3 или 1 2/3

4)-4

Пошаговое объяснение:

Answer 2

-2 3/8+(-1 1/4) =5.125
-48,72:12=4.06
(2-3/4-4/5)*20=12/3
-18*(1/3-1/9)=4

Answer 3

Let's solve each of these equations step by step:

1. $-2 \frac{3}{8} + (-1 \frac{1}{4})$: First, convert the mixed fractions to improper fractions: $-2 \frac{3}{8} = -\frac{19}{8}$ $-1 \frac{1}{4} = -\frac{5}{4}$

   Now, add the fractions: $-\frac{19}{8} + (-\frac{5}{4}) = -\frac{19}{8} - \frac{5}{4} = -\frac{38}{8} - \frac{5}{4} = -\frac{38}{8} - \frac{10}{8} = -\frac{48}{8} = -6$

   So, $-2 \frac{3}{8} + (-1 \frac{1}{4}) = -6$

2. $-48,72 \div 12$: Simply divide -48.72 by 12: $-48.72 \div 12 = -4.06$

   So, $-48.72:12 = -4.06$

3. $(2 - \frac{3}{4} - \frac{4}{5}) \times 20$: First, subtract the fractions within the parentheses: $\frac{3}{4} - \frac{4}{5} = \frac{15}{20} - \frac{16}{20} = -\frac{1}{20}$

   Now, substitute this value back into the expression: $2 - \frac{1}{20} \times 20 = 2 - 1 = 1$

   So, $(2 - \frac{3}{4} - \frac{4}{5}) \times 20 = 1$

4. $-18 \times (\frac{1}{3} - \frac{1}{9})$: First, subtract the fractions within the parentheses: $\frac{1}{3} - \frac{1}{9} = \frac{3}{9} - \frac{1}{9} = \frac{2}{9}$

   Now, substitute this value back into the expression: $-18 \times \frac{2}{9} = -4$

   So, $-18 \times (\frac{1}{3} - \frac{1}{9}) = -4$