Question

3/10-9/25:(4-1 9/10)+4/7

Answer 1

3/10 - 9/25 : (4 - 1 9/10) + 4/7 = 3/10 - 0,36 : 2,1 + 4/7 =

= 63/210 - 36/210 + 120/210 = 147/210 = 0,7

Answer 2

Решение внизу на фото

Answer 3

To calculate the expression 3/10 - 9/25 - (4 - 1 9/10) + 4/7, follow these steps:

Step 1: Convert the mixed number 4 - 1 9/10 to an improper fraction. 4 - 1 9/10 = 4 - (1 + 9/10) = 4 - (10/10 + 9/10) = 4 - 19/10 = (40/10 - 19/10) = 21/10

Step 2: Perform the subtraction and addition within the parentheses. 3/10 - 9/25 - (4 - 1 9/10) + 4/7 = 3/10 - 9/25 - 21/10 + 4/7

Step 3: Find the common denominator for all the fractions, which is 350 (the least common multiple of 10, 25, and 7).

Step 4: Convert all the fractions to have a denominator of 350. 3/10 = (3/10) * (35/35) = 105/350 9/25 = (9/25) * (14/14) = 126/350 21/10 = (21/10) * (35/35) = 735/350 4/7 = (4/7) * (50/50) = 200/350

Step 5: Perform the subtraction and addition. 105/350 - 126/350 - 735/350 + 200/350 = (105 - 126 - 735 + 200)/350 = -556/350

Step 6: Simplify the result, if possible. -556/350 can be simplified by dividing both the numerator and denominator by their greatest common divisor (GCD), which is 2. -556/350 = (-278/175)

So, the final result is -278/175.