Question

Вычислить значение числового выражения ПОМОГИТЕ ПОЖАЛУЙСТА... 3 целых 2/15 -1целую 1/7=??? и 2 выражение: 8,31 -(4,29+3,721)=?? заранее спасибо!!!

Answer 1

А)3 5/8  ×  1 7/9 = 29/8  ×  16/9 =  58/9 = 6 4/96 4/9  ×  21/58 = 58/9  ×  21/58 =  7/3 = 2 1/3ответ 2 1/3б)2/9  +  5/6 = (2 × 2  +  5 × 3)/18 = 4/18  +  15/18 =  19/18 = 1 1/181 1/18  ×  36 = 19/18  ×  36 =  38ответ 38в)4  -  7/8 =(4 × 8  -  7 × 1)/8 = 32/8  -  7/8 =  25/8 = 3 1/83  +  1/5 =3 1/53 1/8  ×  3 1/5 = 25/8  ×  16/5 =  10ответ 10

Answer 2

Calculation of Numerical Expressions

To calculate the value of the given numerical expressions, let's break them down step by step.

Expression 1: 3 whole 2/15 - 1 whole 1/7

To calculate this expression, we need to subtract the second value from the first value.

First, let's convert the mixed fractions into improper fractions: - 3 whole 2/15 can be written as (3 * 15 + 2)/15 = 47/15 - 1 whole 1/7 can be written as (1 * 7 + 1)/7 = 8/7

Now, we can subtract the second value from the first value: 47/15 - 8/7

To subtract fractions, we need to find a common denominator. In this case, the common denominator is 15 * 7 = 105.

Converting both fractions to have a denominator of 105: (47/15) * (7/7) = 329/105 (8/7) * (15/15) = 120/105

Now, we can subtract the fractions: 329/105 - 120/105 = (329 - 120)/105 = 209/105

Therefore, the value of the first expression is 209/105.

Expression 2: 8.31 - (4.29 + 3.721)

To calculate this expression, we need to perform the addition inside the parentheses first, and then subtract the result from 8.31.

Adding the values inside the parentheses: 4.29 + 3.721 = 7.011

Now, we can subtract the result from 8.31: 8.31 - 7.011 = 1.299

Therefore, the value of the second expression is 1.299.

I hope this helps! Let me know if you have any further questions.