Question

(2/7+1/4)*2=?;2/7*14=? с объяснением

Answer 1

Ответ:

1)(0,29+0,25)*2=1,08

2)0,29*14=4,06

Пошаговое объяснение:

вначале в душках

2/7=0,29

1/4=0,25

0,29+0,25=0,54

0,54*2=1,08

Answer 2

Let's solve the two mathematical expressions step by step:

1. (2/7 + 1/4) * 2:

Step 1: Find a common denominator for 7 and 4, which is 28.

Step 2: Convert the fractions to have the common denominator: (2/7) * (4/4) + (1/4) * (7/7) = 8/28 + 7/28

Step 3: Add the fractions with the same denominator: (8/28) + (7/28) = 15/28

Step 4: Finally, multiply the result by 2: (15/28) * 2 = 30/28

Now, we can simplify the result by dividing the numerator and denominator by their greatest common divisor (GCD):

GCD(30, 28) = 2 30 ÷ 2 = 15 28 ÷ 2 = 14

So, the simplified result is:

(30/28) = 15/14.

2. 2/7 * 14:

To multiply a fraction by a whole number, you can simply multiply the numerator (the top number) by the whole number while keeping the denominator (the bottom number) the same.

(2/7) * 14 = 2 * 14 / 7 = 28 / 7

The fraction 28/7 can be simplified by dividing the numerator and denominator by their GCD:

GCD(28, 7) = 7 28 ÷ 7 = 4 7 ÷ 7 = 1

So, the simplified result is:

(28/7) = 4.

To summarize:

1. (2/7 + 1/4) * 2 = 15/14
2. 2/7 * 14 = 4

If you have any other questions or need further explanations, feel free to ask!