Question

Найдите значение каждого выражения двумя способами Не изменяй словами заменить одно из слагаемых круглые числа Сравните полученные результаты 27+19 . 54+38 . 14+49

Answer 1

19+27=46. 38+54=96. 49+14=63

Answer 2

27+19=46     19+27=46
54+38=92     38+54=92
14+49=63     49+14=63

Answer 3

Finding the Mean of Expressions

To find the meaning of each expression in two different ways without changing the words, we can use mathematical operations and mathematical properties.

27 + 19: - First way: Adding the numbers directly, we get 27 + 19 = 46. - Second way: We can also find the mean of the two numbers by adding them and dividing by 2. (27 + 19) / 2 = 46 / 2 = 23.

54 - 38: - First way: Subtracting the numbers directly, we get 54 - 38 = 16. - Second way: We can also find the mean of the two numbers by subtracting them and dividing by 2. (54 - 38) / 2 = 16 / 2 = 8.

14 * 49: - First way: Multiplying the numbers directly, we get 14 * 49 = 686. - Second way: We can also find the mean of the two numbers by multiplying them and taking the square root. √(14 * 49) = √686 ≈ 26.1916.

Comparing the Results: - For addition and subtraction, the results are the same using both methods. - However, for multiplication, the results differ. This is because finding the mean of two numbers by taking the square root after multiplication is different from direct multiplication.

These are the two different ways to find the meaning of each expression without changing the words and the comparison of the results.

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