Efectuati :
a)1/2 +5/3 =
b) 1/2 + 2/5 =
c) 5/2 +1/6 =
d) 7/12+1/24
e) 1/18+736+11/72=
f) 3 intregi si 2/3 +1 intreg si 1/6 +2=
g) 1/28+7/27+1/84=
h) 1/8+1intreg si 1/3+4 intregi si 4/2=
i) 2 intregi si 1/10 + 3 intregi 1/35 + 1 intreg 3/14 =
j) 7/120+11/240+1/400 =

1

Răspunsuri

2014-08-02T21:25:31+03:00
A) 1/2 +5/3=  (3+10)/6=  13/6

b)1/2+2/5= (5+4)/10= 9/10

c)5/2 +1/6= (15+1)/6= 16/6=8/3

d)7/12 +1/24= (14+1)/24= 15/24= 5/8

e)1/18 +7/36 +11/72= (4+14+11)/72=  29/72

f)3 intregi 2/3 + 1 intreg 1/6 +2= 11/3 +7/6 +2=  (22+7+12)/6=  41/6

g)1/28 +7/27 +1/84=(27+196+9)/756=  232/756= 116/378=  116/189

h)1/8 + 1 intreg 1/3 +4 intregi 4/2= 1/8 +4/3 +12/2= (3+32+144)/24=  179/24

i)2 intregi 1/10 +3 intregi 1/35 +1 intreg 3/14= 21/10 +108/35 +17/14= (147+ 216+85)/70=

=448/70= 64/10= 32/5

j) 7/120 +11/240 +1/400= (70+ 55+3)/1200= 135/1200=  27/240= 9/80
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