①33+17+44=
②36+17-12=
③81-12-38=
④100-56+18=
23+19+46= 80-16-35=
63-29+17= 37+18-19=
14+36+17=
32+18-17=
37-18+13=
87-15-23=
28+34+17= 96-57-26= 84-27+39=
①19+28+35=
②73-27-38=
③43+(62-35)=
26+19+37= 100-46-28= 56+34-16=
75-(43-26)= 96-19-37= 29+53-58=