Question

5,1 × 2/3-2 1/4 решите пж​

Answer 1

Ответ:

минус 37/20

Пошаговое объяснение:

преобразуем десятичную дробь 5,1 в обыкновенную 51/10 далее сокращяем числа 51 в первой дроби и во второй 3 далее получаем 51/10*2/3-21/4 сокращаем 10 и 2 и получаем 17/5-21/4 приводим к общему знаменателю и получаем -37/20

Answer 2

To solve the expression, let's follow the order of operations (PEMDAS/BODMAS):

P - Parentheses (simplify within parentheses if there are any) E - Exponents (perform any exponentiation, which includes squares and cubes) MD/AS - Multiplication and Division (perform these operations from left to right) AS - Addition and Subtraction (perform these operations from left to right)

Now, let's solve the expression step by step:

Step 1: Convert the mixed number to improper fraction: 2 1/4 = (2 * 4 + 1) / 4 = 9 / 4

Step 2: Perform the multiplication first: 5.1 * (2/3) = 5.1 * 2/3 = 10.2 / 3

Step 3: Perform the subtraction: 10.2 / 3 - 9 / 4

Step 4: Find a common denominator for the fractions, which is 12 (the least common multiple of 3 and 4):

(10.2 * 4) / (3 * 4) - (9 * 3) / (4 * 3)

Step 5: Simplify the fractions:

40.8 / 12 - 27 / 12

Step 6: Perform the subtraction:

(40.8 - 27) / 12

Step 7: Final calculation:

13.8 / 12

The result of the expression is approximately 1.15.