Question

va rog muuult orice exercitiu

Answer 1

a) 1/2 + 5/3 = (3+2×5)/6 = 13/6
b) 1/2 + 2/5 = (5+2×2)/10 = 9/10
c) 5/2 + 1/6 = (5×3+1)/6 = 16/6 = 8/3
d) 7/12 + 1/24 = (7×2+1)/24 = 15/24 = 5/8
e) 1/18+7/36+11/72 = (4+2×7+11)/72 = 29/72
f) 3 2/3+1 1/6+2 = 11/3+7/6+1 = (11×2+7+6)/6 = 35/6
g) 1/28+7/72+1/84 = (18+7×7+6)/504 =
= 73/504
h) 1/8+1 1/3+4 1/2 = 1/8+4/3+9/2 =
= (3+4×8+9×12)/24 =
= 143/24
i) 2 1/10+3 1/35+ 1 3/14 =
= 21/10+106/35+17/14 =
= (21×7+106×2+17×5)/70 =
= (146+212+85)/70 =
= 443/70
j) 7/120+11/240+1/400 =
= 7×10/1200+11×5/1200+3/1200 =
= 70/1200+55/1200+3/1200=
= 128/1200 =
= 32/300 =
= 8/75