Question

2×(1/4-1/2), (1/9-1/3)×(-3),1/2×(2/3-2/5),-1/3×(3/4-3/5).

Answer 1

1)-0.5

2)0.67

3)0.13

4)-0.5

Answer 2

Ответ:

1) -1/2

2) 2/3

3) 2/15

4) -1/20

Пошаговое объяснение:

проверено.

Answer 3

Let's simplify each of these expressions step by step:

1. $2 \times \left(\frac{1}{4} - \frac{1}{2}\right)$ First, simplify the inside of the parentheses: $\frac{1}{4} - \frac{1}{2} = \frac{1}{4} - \frac{2}{4} = -\frac{1}{4}$ Now, multiply by 2: $2 \times \left(-\frac{1}{4}\right) = -\frac{2}{4} = -\frac{1}{2}$

2. $\left(\frac{1}{9} - \frac{1}{3}\right) \times (-3)$ First, simplify the inside of the parentheses: $\frac{1}{9} - \frac{1}{3} = \frac{1}{9} - \frac{3}{9} = -\frac{2}{9}$ Now, multiply by -3: $-3 \times \left(-\frac{2}{9}\right) = \frac{6}{9} = \frac{2}{3}$

3. $\frac{1}{2} \times \left(\frac{2}{3} - \frac{2}{5}\right)$ First, simplify the inside of the parentheses: $\frac{2}{3} - \frac{2}{5} = \frac{10}{15} - \frac{6}{15} = \frac{4}{15}$ Now, multiply by $\frac{1}{2}$: $\frac{1}{2} \times \frac{4}{15} = \frac{4}{30} = \frac{2}{15}$

4. -\frac{1}{3} \times \left(\frac{3/4 - 3/5}\right) First, simplify the inside of the parentheses: $\frac{3}{4} - \frac{3}{5} = \frac{15}{20} - \frac{12}{20} = \frac{3}{20}$ Now, multiply by $-\frac{1}{3}$: $-\frac{1}{3} \times \frac{3}{20} = -\frac{3}{60} = -\frac{1}{20}$

So, the simplified expressions are:

1. $-\frac{1}{2}$
2. $\frac{2}{3}$
3. $\frac{2}{15}$
4. $-\frac{1}{20}$