Question

В) 10:2/5-3/10,г)(1.1/2-3/8):3​

Answer 1

В) 25-0,3=24,7

Г)5, 125:3=1,7

Answer 2

10÷2/5-3/10=24,7

10÷2/5=10/1×5/2=25

25-3/10=25-0,3=24,7

(1. 1/2-3/8)÷3=3/8

1. 1/2-3/8=3/2-3/8=12-3/8=9/8=1 1/8

9/8÷3/1=9/8×1/3=9/24=3/8

Answer 3

Let's solve the expressions step by step:

a) $10:2/5-3/10$

To solve this expression, we need to follow the order of operations, which is commonly remembered as PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition, and Subtraction).

1. Division: $10 : \frac{2}{5} = 10 \times \frac{5}{2} = 10 \times 2.5 = 25$

2. Subtraction: $25 - \frac{3}{10}$

To subtract fractions, we need a common denominator, which in this case is 10.

$25 - \frac{3}{10} = \frac{250}{10} - \frac{3}{10} = \frac{250 - 3}{10} = \frac{247}{10}$

So, the result of the expression is $\frac{247}{10}$ or $24.7$.

b) $(1.1/2-3/8) : 3$

Again, let's follow the order of operations:

1. Division: $\frac{1.1}{2} = 0.55$

   $\frac{3}{8} = 0.375$

2. Subtraction: $0.55 - 0.375 = 0.175$

3. Division: $\frac{0.175}{3} = 0.0583333...$

Rounded to three decimal places, the result of the expression is approximately $0.058$.

So, the final answers are: a) $10 : \frac{2}{5} - \frac{3}{10} = \frac{247}{10}$ or $24.7$. b) $\left(\frac{1.1}{2} - \frac{3}{8}\right) : 3 \approx 0.058$.