计算题
69+21=70-25=
91-25=82-57=
90-58-30=75-28-35=
67-37-14=75-28-19=
28+35+17=90-34-26=
65-18+39=26+(40-8)=
42-(6+34)=74-(80-6)=
43-(8+30)=96-(60-24)=
73-(26+30)=32+(55-46)=
按规律填一填:
24,32,40,( ),56,(( ),( )93,86,79,( ),65,( ),( )
61+25=43-29= 26+48=54+16= 86-(13+42)=21-14= 100-92-8=17-14= 69+30-45=81-17= 71-(65-43)=
17+6+8=
73-26-30=
69+27=