我是小小口算家.
23+34=________ 45+32=________ 55-35=________
80-40=________ 50+30=________ 77-35=________
36+33=________ 43-21=________ 57-25=________
40+30=________ 58-28=________ 34+54=________
90-60=________ 62-30=________ 45+43=________
30+40=________ 60-30=________ 67+13=________
43+23=________ 77-57=________