Question

1. oblicz : a. - 7-8-{-12}+5= b. -12-{-23}-14-{-17}-{-9}= c. -65-{-35}+{-33}-{-26}= d. 23-46+31-57-{-34}+{-71}= 2. oblicz : a. 243-(-532)=

b.-634+(-876)=

c.-294+(-756)-(-342)=

d.1402-(-932)-703+(-903)=

Proszę o rozwiązania razem z obliczeniami.

Answer 1

ZAD. 1

- 7-8-{-12}+5= = -15+12+5 = -3+5 = 2

-12-{-23}-14-{-17}-{-9}= -12+23-14+17+9 = 11-14+26 = -3+26 = -23

-65-{-35}+{-33}-{-26}= -65+35-33+26 = -65+2+26= -63+26 = 37

23-46+31-57-{-34}+{-71}= = -23+31-57+34-71 = 8-57+34-71= -49+34-71= -15-71 = -86

 

ZAD.2

243-(-532)= 243+532 = 775

-634+(-876)= -634-876 = -1510

-294+(-756)-(-342)= -294 - 756 + 342 = -1050 + 342 = -708

1402-(-932)-703+(-903)= 1402 +932 - 703 - 903 = 1402 - 703 - 903 + 932 = 699 + 29 = 728