thiab peb pom tau tias muaj 2 x 4= 8 kaum ob hauv ob feem peb.
pes tsawg kaum ob yog sib npaug rau 2 3?
Ob feem peb yog yim-twelfths thiab tsib thib rau yog kaum-twelfths. Ib nrab ntawm yim lub kaum ob thiab kaum kaum ob yog cuaj kaum ob.
pes tsawg kaum ob nyob rau hauv plaub?
pes tsawg kaum ob nyob hauv ib lub hlis twg? muaj 3 vim 3/12 sib npaug 1/4.
Puas muaj kaum ob qhov sib npaug peb plaub plaub sau koj cov lus teb ua tus lej tag nrho?
pes tsawg tus kaum ob sib npaug peb-plaub? Sau koj cov lus teb raws li tus lej tag nrho. Nws yuav siv cuaj 1/12 vuas kom npog peb 1/4 vuas, yog li 3/4= 9/12. Muaj pes tsawg lub kaum tsib sib npaug plaub feem tsib?
pes tsawg yim nyob rau ib nrab?
Ib yim yog ib feem ntawm yim seem sib npaug. Ob yim yog ib lub hlis twg thiab plaub yim yog ib nrab.