Question

Сравни, не выполняя вычеслений. 297+289+299+286+293_299+297+288+294+289516+561+651+165+615_650+617+516+561+1651989+1999+1987+1986_1987+1995+1988+1989​

Answer 1

Ответ:

297+289+299+286+293<299+297+288+294+289

516+561+651+165+615<650+617+516+561+165

1989+1999+1987+1986>1987+1995+1988+1989

(так как то )

Answer 2

Ответ:

1)297+289+299+286+293 меньше 299+297+288+294+279

2)516+561+651+165+615 меньше 650+617+516+561+165

3)1989+1999+1987+1986 меньше 1987+1985+1988+1989

Answer 3

To compare the given expressions without performing calculations, we can look for patterns and relationships between the numbers. Let's break down the expressions and analyze them: Expression 1: 297 + 289 + 299 + 286 + 293 Expression 2: 299 + 297 + 288 + 294 + 289 Expression 3: 516 + 561 + 651 + 165 + 615 Expression 4: 650 + 617 + 516 + 561 + 165 Expression 5: 1989 + 1999 + 1987 + 1986 Expression 6: 1987 + 1995 + 1988 + 1989 #### Expression 1 and Expression 2: Looking at Expression 1 and Expression 2, we can see that they have the same numbers, but in a different order. The sum of the numbers in both expressions will be the same, regardless of the order in which they are added. Therefore, the result of Expression 1 will be equal to the result of Expression 2. #### Expression 3 and Expression 4: Similar to Expression 1 and Expression 2, Expression 3 and Expression 4 also have the same numbers, but in a different order. Therefore, the result of Expression 3 will be equal to the result of Expression 4. #### Expression 5 and Expression 6: Expression 5 and Expression 6 have different numbers, but they have the same number of terms. Since the order of addition does not affect the result, the sum of the numbers in Expression 5 will be equal to the sum of the numbers in Expression 6. To summarize: - The result of Expression 1 is equal to the result of Expression 2. - The result of Expression 3 is equal to the result of Expression 4. - The result of Expression 5 is equal to the result of Expression 6. Therefore, we can conclude that the values of the given expressions are equal without performing any calculations.