Question

-21/3*(-9)=-4,65-3,18=-1,3:1/30=3 2/7-6 1/3

Answer 1

Ответ:

1)63

2)-7.83

3).

4)-3.04761904762

Answer 2

Let's break down each expression step by step:

1. -21/3 * (-9): This involves multiplying two numbers: -21/3 and -9. We can simplify this expression as follows: -21/3 * (-9) = (-21 * -9)/3 = 189/3 = 63.

2. -4.65 - 3.18: Here we need to subtract two decimal numbers: -4.65 and 3.18. -4.65 - 3.18 = -7.83.

3. -1.3 divided by 1/30: Dividing by a fraction is the same as multiplying by its reciprocal. In this case, we have -1.3 divided by 1/30, which is equivalent to -1.3 multiplied by 30/1. -1.3 * (30/1) = -1.3 * 30 = -39.

4. 3 2/7 - 6 1/3: To subtract mixed numbers, we need to convert them into improper fractions. 3 2/7 = (3 * 7 + 2)/7 = 23/7. 6 1/3 = (6 * 3 + 1)/3 = 19/3. Now, we can subtract the fractions: 23/7 - 19/3 = (23 * 3 - 19 * 7)/(7 * 3) = (69 - 133)/21 = -64/21.

Therefore, the results of the given expressions are: -21/3 * (-9) = 63 -4.65 - 3.18 = -7.83 -1.3 : (1/30) = -39 3 2/7 - 6 1/3 = -64/21.