Question

А)3/7*(1/4+4/9),б) 4/5-1/4:5/6 НАЙТИ ЗНАЧЕНИЕ ВЫРАЖЕНИЯ!!!!!!!

Answer 1

А)3/7*(1/4+4/9)=3/7*(9/36+16/36)=3/7*25/36=25/84
б)4/5-1/4:5/6=4/5-1/4*6/5=4/5-3/10=8/10-3/10=5/10=1/2=0,5

Answer 2

А) 1/4+4/9=25/36*3/7=25/84
б) 1)1/4*6/5=3/10    2)4/5-3/10=8/10-3/10=5/10=1/2=0.5

Answer 3

Calculation of the Expression

To calculate the expression 3/7*(1/4+4/9)+4/5-1/4:5/6, we can follow the order of operations (PEMDAS/BODMAS) to simplify the expression step by step.

1. First, let's simplify the expression inside the parentheses: 1/4 + 4/9. - The common denominator for 4 and 9 is 36. - So, 1/4 can be written as 9/36 and 4/9 can be written as 16/36. - Adding these fractions, we get 9/36 + 16/36 = 25/36.

2. Now, let's multiply 3/7 by 25/36. - Multiplying the numerators and denominators, we get 75/252.

3. Next, let's divide 1/4 by 5/6. - Dividing fractions is the same as multiplying by the reciprocal. - So, 1/4 ÷ 5/6 is equivalent to 1/4 * 6/5. - Multiplying the numerators and denominators, we get 6/20.

4. Finally, let's add 75/252 and 4/5 and subtract 6/20. - To add or subtract fractions, we need a common denominator. - The common denominator for 252, 5, and 20 is 2520. - So, 75/252 can be written as 945/2520, 4/5 can be written as 1008/2520, and 6/20 can be written as 378/2520. - Adding 945/2520 and 1008/2520, we get 1953/2520. - Subtracting 378/2520 from 1953/2520, we get 1575/2520.

Therefore, the value of the expression 3/7*(1/4+4/9)+4/5-1/4:5/6 is 1575/2520.

Answer

The value of the expression 3/7*(1/4+4/9)+4/5-1/4:5/6 is 1575/2520.