Question

3 7/15×0,25+5/6-1 2/5СРРОООЧНОООО!ДАМ 30 БАЛЛОВ ​

Answer 1

відповідь:

0,3

я проверяла

Answer 2

To solve the expression 3 7/15 × 0.25 + 5/6 - 1 2/5, let's break it down step by step:

Step 1: Convert the mixed numbers to improper fractions: 3 7/15 = (3 × 15 + 7) / 15 = 52/15 1 2/5 = (1 × 5 + 2) / 5 = 7/5

Step 2: Perform the multiplication: 52/15 × 0.25 = (52 × 0.25) / 15 = 13/3

Step 3: Perform the addition and subtraction: 13/3 + 5/6 - 7/5

To add and subtract fractions, we need a common denominator. The least common multiple (LCM) of 3, 6, and 5 is 30.

Step 4: Convert the fractions to have a denominator of 30: 13/3 = (13 × 10) / (3 × 10) = 130/30 5/6 = (5 × 5) / (6 × 5) = 25/30 7/5 = (7 × 6) / (5 × 6) = 42/30

Step 5: Perform the addition and subtraction: 130/30 + 25/30 - 42/30 = (130 + 25 - 42) / 30 = 113/30

Therefore, the value of the expression 3 7/15 × 0.25 + 5/6 - 1 2/5 is 113/30.