26+1716+27 56-19 34+16 35+56-2756+(35-27)
97-2597-52 1米10厘米90厘米 87-23-3487-(34-23)
72-15-28= 100-68+24=
63-45= 28+46=
12+36+48= 70-(37-26)=
27+62= 58+29= 92-69=
33+37+16= 76-(24+39)= 80-45-27=
75+□<90 51<72-□
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