Question

Решить 1 1/49:25/42; 7/48:6 6/7; 5 7/13:4/39;

Answer 1

Ответ:1) 50/49:25/42=84/49=1 35/49

2) 7/48:48/7=49/2304

3) 72/13:4/39=72*3/4=54

Пошаговое объяснение:

Answer 2

To solve these expressions, we'll follow the order of operations (PEMDAS/BODMAS) and perform the calculations step by step. The order of operations is Parentheses/Brackets, Exponents/Orders, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right).

Let's start with the first expression:

1 + 1/49 ÷ 25/42

Step 1: Convert mixed numbers to improper fractions. 1 + 1/49 = (49 + 1) / 49 = 50 / 49

Step 2: Invert the second fraction and change division to multiplication. 50 / 49 × 42 / 25

Step 3: Simplify the fraction by canceling common factors. (50 × 42) / (49 × 25) = 2100 / 1225 = 12/7

Now, let's move on to the second expression:

7/48 ÷ 6 + 6/7

Step 1: Invert the first fraction and change division to multiplication. (48/7) × 6 + 6/7

Step 2: Find a common denominator for both fractions (which is 7). (48/7) × 6/1 + 6/7

Step 3: Perform the multiplication and addition. (48 × 6) / 7 + 6/7 = 288/7 + 6/7 = (288 + 6) / 7 = 294/7 = 42

Next, let's solve the third expression:

5 + 7/13 ÷ 4/39

Step 1: Convert the whole number to a fraction with the same denominator as the second fraction. 5 = 5/1

Step 2: Invert the second fraction and change division to multiplication. 5/1 × 39/4

Step 3: Perform the multiplication. (5 × 39) / 4 = 195 / 4

Lastly, let's solve the fourth expression:

There seems to be a mistake in the last expression you provided. It appears to be incomplete. If you could provide the correct expression, I'd be happy to help you solve it.

To recap the solutions:

1. 1 + 1/49 ÷ 25/42 = 12/7
2. 7/48 ÷ 6 + 6/7 = 42
3. 5 + 7/13 ÷ 4/39 = 195/4

If you have the complete fourth expression, please provide it, and I'll assist you in solving it.