Question

Д) (-48+91)+(-91)=е) (-34+59)+-34=ж) (47+(-91))+91=и) - 28+(18+29)=к) -10+(-10+30)=вычислите сумму применяя законы сложения

Answer 1

Д)=-48
е)=-9
ж)=47
и)=19
к)=10

Answer 2

Task: Calculate the sum using the laws of addition

To calculate the sum, let's evaluate each expression step by step:

a) (-48 + 91) + (-91):

- First, add -48 and 91: -48 + 91 = 43. - Then, add 43 and -91: 43 + (-91) = -48.

Therefore, the sum of (-48 + 91) + (-91) is -48.

b) (-34 + 59) + (-34):

- First, add -34 and 59: -34 + 59 = 25. - Then, add 25 and -34: 25 + (-34) = -9.

Therefore, the sum of (-34 + 59) + (-34) is -9.

c) (47 + (-91)) + 91:

- First, add 47 and -91: 47 + (-91) = -44. - Then, add -44 and 91: -44 + 91 = 47.

Therefore, the sum of (47 + (-91)) + 91 is 47.

d) -28 + (18 + 29):

- First, add 18 and 29: 18 + 29 = 47. - Then, add -28 and 47: -28 + 47 = 19.

Therefore, the sum of -28 + (18 + 29) is 19.

e) -10 + (-10 + 30):

- First, add -10 and -10: -10 + (-10) = -20. - Then, add -20 and 30: -20 + 30 = 10.

Therefore, the sum of -10 + (-10 + 30) is 10.

In summary, the calculated sums are: - a) (-48 + 91) + (-91) = -48 - b) (-34 + 59) + (-34) = -9 - c) (47 + (-91)) + 91 = 47 - d) -28 + (18 + 29) = 19 - e) -10 + (-10 + 30) = 10

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