<span>1/98+1/112+1/154=
98=2*7*7
112=2*2*2*2*7
154=2*7*11
НОК(98, 112, 154)=2*2*2*2*7*7*11=4312
<span>1/98+1/112+1/154=(1*88+1*77+1*56) / 4312 = 221/4312</span></span>
247×204=50388
50388-50179=209
689×209=144001
607*72=43704
<span>144001+43704=187705</span>