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Eduard45
a fost răspuns

Calculati si scrieti rezultatul sub forma de fractie zecimala: a) 1supra2+5supra4; b)1supra9+3supra7; c)3supra8+13supra117; d)1supra6+3supra8; e)1supra5+7supra15+5supra8; f)1supra4+7supra24+5supra8; g)3+1supra4+2supra5; h)3supra11+4supra3+7supra12; I)1supra5-1supra7; j)7supra20-5supra18; k)8supra13-5supra39.

DAU COROANA SI 99 DE PUNCTE !! E URGENT !!

Răspuns :

a) 1/2+5/4=2+5/4=7/4=1,75
b) 1/9+3/7=7+27/63=34/63=0,53
c) 3/8+13/117 = 3/8+1/9=27+8/72=35/72=0,48
d) 1/6+3/8 = 4+9/24=13/24=0,54
e) 1/5+7/15+5/8 = 24+56+75/120=155/120=31/24=1,29
f) 1/4+7/24+5/8 = 6+7+15/24=28/24=7/6=1,1(6)
g) 3+1/4+2/5=4/4+2/5=1+2/7/5=1,4
h) 3/11+4/3+7/12=36+176+77/132=289/132=2,189
l) 1/5-1/7=7-5/35=2/35=0,057
j) 7/20-5/18 = 63-50/180=13/180=0,07(2)
k) 8/13-5/39 = 24-5/39=19/39=0,48