Question

Округлите числа а и b с точностью до 0,01 и вычислите приближенно их сумму и разность а) а= 5, 347, b=2, 1753; б) а= -7, 6539, b= 11, 638; в) а= - 9, 014, b= - 3, 285. СДЕЛАТЬ ПО ДЕЙСТВИЯМ!

Answer 1

Ответ:

а) а ≈ 5,35; b ≈ 2,18;   7,53 сумма а и b;    3,17 разность а и b

б) а ≈ -7,65;     b ≈ 11,64;   3,99 сумма а и b;   -19,29 разность а и b

в) а ≈ -9,01;   b ≈ -3,29;   -12,3 сумма а и b;  -5,72 разность а и b

Пошаговое объяснение:

а) а = 5,347 ≈ 5,35 , b = 2,1753 ≈ 2,18

5,35 + 2,18 ≈ 7,53 сумма а и b

5,35 - 2,18 ≈ 3,17 разность а и b

б) а= -7, 6539 ≈ -7,65   b = 11, 638 ≈ 11,64

-7,65 + 11,64 ≈ 3,99 сумма а и b

-7,65 - 11,64 ≈  -19,29 разность а и b

в) а= - 9,014 ≈ -9,01 , b= - 3, 285 ≈ -3,29

-9,01 + (-3,29) ≈ -9,01 - 3,29 ≈ -12,3 сумма а и b

-9,01 - (-3,29) ≈ -9,01 + 3,29 ≈ -5,72 разность а и b

Answer 2

Rounding Numbers and Calculating Approximate Sum and Difference

To round the numbers a and b to a precision of 0.01, we can use the following steps:

1. Round a to 2 decimal places. 2. Round b to 4 decimal places.

Let's calculate the approximate sum and difference for each given set of numbers:

a) For a = 5.347 and b = 2.1753:

- Rounding a to 2 decimal places, we get a ≈ 5.35. - Rounding b to 4 decimal places, we get b ≈ 2.1753.

The approximate sum of a and b is 5.35 + 2.1753 ≈ 7.5253. The approximate difference between a and b is 5.35 - 2.1753 ≈ 3.1747.

b) For a = -7.6539 and b = 11.638:

- Rounding a to 2 decimal places, we get a ≈ -7.65. - Rounding b to 4 decimal places, we get b ≈ 11.638.

The approximate sum of a and b is -7.65 + 11.638 ≈ 3.988. The approximate difference between a and b is -7.65 - 11.638 ≈ -19.288.

c) For a = -9.014 and b = -3.285:

- Rounding a to 2 decimal places, we get a ≈ -9.01. - Rounding b to 4 decimal places, we get b ≈ -3.285.

The approximate sum of a and b is -9.01 + (-3.285) ≈ -12.295. The approximate difference between a and b is -9.01 - (-3.285) ≈ -5.725.

Please note that these calculations are approximate due to rounding.