Question

Aduceti la cel mai mic numitor comun fractiile...

a) 8 supra 9, 9 supra 7

b) 3 supra 4, 5 supra 7, 8 supra 3

c) 3 supra 11, 9 supra 4

d) 4 supra 5, 6 supra 7, 5 supra 6

e) 5 supra 12, 11 supra 8, 17 supra 48

f) 2 supra 35, 1 supra 70, 3 supra 140

g) 9 supra 13, 15 supra 104, 23 supra 52

h) 5 supra 62, 13 supra 31, 9 supra 155

i) 7 supra 15, 41 supra 225, 19 supra 75

j) 3 supra 32, 7 supra 24, 11 supra 40, 7 supra 48

k)5 supra 12, 1 supra 54, 7 supra 36

l) 2 supra 15, 1 supra 72, 5 supra 24

m) 3 supra 25, 7 supra 18, 1 supra 75

n) 7 supra 60, 1 supra 72, 5 supra 24

0) 1 supra 441, 1 supra 168, 5 supra 98

p) 1 supra 2 la puterea 2 ori 3 ori 5, 3 supra 3 la puterea 2 ori 7

q) 9 supra 14, 8 supra 35, 6 supra 49, 3 supra 10

r) 29 supra 36, 7 supra 27, 5 supra 216, 1 supra 40

s) 19 supra 9600, 11 supra 1600, 7 supra 240, 9 supra 400, 1 supra 4800

ș) 7supra 14400, 1 supra 1800, 11 supra 900, 1, supra 7200

Answer 1

/ supra
|× inmultit cu...
a) 8/9 |×7, 9/7 |×9;
56/63, 81/63
b) 3/4 |×21, 5/7 |×12, 8/3 |×28
63/84, 60/84, 224/84
c) 3/11 |×4, 9/4 |×11
12/44, 99/44
d) 4/5 |×42, 6/7 |×30, 5/6 |×35
168/210, 180/210, 175/210
e) 5/12 |×4, 11/8 |×6, 17/48 |×1
20/48, 66/48, 17/48
f) 2/35 |×4, 1/70 |×2, 3/140 |×1
8/140, 2/140, 3/140
g) 9/13 |×8, 15/104 |×1, 23/52 |×2
72/104, 15/104, 46/104
h) 5/62 |×5, 13/31 |×10, 9/155 |×2
25/310, 130/310, 18/310
i) 7/15 |×15, 41/225 |×1, 19/75 |×3
105/225, 41/225, 57/225
j) 3/32 |×15, 7/24 |×20, 11/40 |×12, 7/48 |×10
45/480, 140/480, 132/480, 70/480
k) 5/12 |×9, 1/54 |×2, 7/36 |×3
45/108, 2/108, 21/108
l) 2/15 |×24, 1/72 |×5, 5/24 |×15
48/360, 5/360, 75/360
m) 3/25 |×18, 7/18 |×25, 1/75 |×6
54/450, 175/450, 6/450
n) 7/60 |×6, 1/72 |×5, 5/24 |×15
42/360, 5/360, 75/360
o) 1/441 |×8, 1/168 |×21, 5/98 |×36
8/3528, 21/3528, 180/3528