Մաթեմատիկա

523.
ա) -1/3 + 2/3 = -1+2/3= 1/3
բ) -1/4 + 3/4 = -1+3/4= 2/4
գ) 1/5 + (-3/5) = 1+(-3)/5= -2/5
դ) 3/4 + (-4/7) = 3+(-4)/7= -1/7
ե) 8/13 + (-12/13) = 8+(-12)/13= -4/13
զ) 19/25 + (-24/25) = 19+(-24)/25= -5/25
529.
ա) -1/6 + 1/9 = -3+2/18= -1/18
բ) 3/10 — 2/15 = 9-4/30= 5/30= 1/6
գ) -2/10 — 6/15 = -6-12/30= -18/30= -3/5
դ) 3/8 — 2/9 = 27-16/72= 9/72= 1/8
ե) -5/12 + 4/15 = -25+16/60= -9/60 = -3/20
զ) 2/16 — (-3/39) = 78-(-48)/624= 126/624= 21/104

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