Question

uitativa in poze sint exerciti
calculatile va rog frumos urgent
dau coroana

Answer 1

e) -7/9 + 8/10 = - 7/9 + 4/5 = (-7 × 5 + 4 × 9)/45 = (-35 + 36)/45 = 1/45
f) -11/12 -1(2/5) = -11/12 - 7/5 = (- 11×5 - 7×12)/60 = (-55 - 84)/60 = - 139/60 = 
= - 2 (19/60)

4. a) 7/8 × 2/5 = 7/20
b) 36/44 × 11/12 = 3/4 
c) 3 (12/16) × 4/10 = 60/16 × 4/10 = 6/4 = 3/2

b) 7/16 : 9/16 = 7/16 × 16/9 = 7/9
c) -11/28 : 33/56 = -11/28 × 56/33 = - 1/4 × 8/3 = - 2/3