Question

(7 3/20-5 1/12)×1,5 _____________ 6 3/7×1,4:1,8

Answer 1

Фоточка тебе в помощь ;)

Answer 2

To solve the expression, let's break it down step by step:

Step 1: Calculate the value of the first expression (7 3/20 - 5 1/12) × 1.5

First, convert the mixed numbers into improper fractions: 7 3/20 = (7 * 20 + 3)/20 = 143/20 5 1/12 = (5 * 12 + 1)/12 = 61/12

Now, subtract the second fraction from the first: 143/20 - 61/12 = (143 * 12 - 61 * 20)/(20 * 12) = (1716 - 1220)/240 = 496/240

Next, multiply the result by 1.5: (496/240) × 1.5 = (496 × 1.5)/(240) = 744/240

Step 2: Calculate the value of the second expression 6 3/7 × 1.4 ÷ 1.8

First, convert the mixed number into an improper fraction: 6 3/7 = (6 * 7 + 3)/7 = 45/7

Next, multiply the fraction by 1.4: (45/7) × 1.4 = (45 × 1.4)/7 = 63/7

Finally, divide the result by 1.8: (63/7) ÷ 1.8 = (63/7) × (1/1.8) = (63 × 1)/(7 × 1.8) = 63/12.6 = 5

So the final answer is:

(7 3/20 - 5 1/12) × 1.5 = 744/240 = 31/10

6 3/7 × 1.4 ÷ 1.8 = 5

Therefore, the full expression becomes:

(31/10) ÷ 5 = (31/10) × (1/5) = 31/50 ≈ 0.62