Question

oblicz pamiętajac o kolejnosci wykonywania działań a)2 1/2+(3 1/2-2)= b) 7 3/4-(2 1/4+2 3/4)= c) (5 3/4+4 2/4)-(3 1/2+ 2 1/2)= d) (6 1/4-2 2/4)+(5 2/4-3 3/4)= e) (4 7/9-3 8/9)-8/9=

Answer 1

a)2 1/2+(3 1/2-2)= 2 1/2 +(7/2 - 4/2)= 5/2+ 3/2 = 8/2 = 4
b) 7 3/4-(2 1/4+2 3/4)= 31/4- (8/4 + 11/4) =31/4- 19/4 = 12/4= 3
c) (5 3/4+4 2/4)-(3 1/2+ 2 1/2)= (23/4 + 18/4) - (7/2+ 5/2)= 41/4- 12/2= 41/4- 10/4 = 31/4

d) (6 1/4-2 2/4)+(5 2/4-3 3/4)= (25/4- 10/4) + (22/4- 15/4) = 15/4 +7/4 =22/4 = 5 1/2

e) (4 7/9-3 8/9)-8/9= (43/9 - 35/9) - 8/9 = 8/9- 8/9 = 0

 

 

Mam nadzieję że pomogłam ;))