Tigas Laila Nurpratiwi, and Rini Setianingsih. “STUDENTS’ HINKING ROCESSES N OLVING PEN-NDED ROBLEMS SING NLINE EARNING AKING NTO CCOUNT HE ATHEMATICAL BILITY”. i: athematics ducation ournal, vol. 4, no. 1, Mar. 2021, pp. 20-30, doi:10.21067/pmej.v4i1.5288.