文档介绍：20+33= 33+60= 70+23= 68+31= 83- 23=
23+65= 75- 46= 45+34= 56- 36= 45- 34=
67+32= 57+32=
98- 54= 76- 29= 100-37= 76- 28= 56+28=
98- 28= 49+28= 98- 36= 87- 23= 45+8=
98-67= 67-45= 36+47= 54+27= 89-54=
38+34 88-45= 47+63= 45+37+ 78+21=
100-38+ 47+29= 76-38= 74-39= 76+18=
93-29= 78-22= 60-34= 72-19= 45-28=
60+32= 27+66= 47+26= 65-28= 45+37=
64+21= 38-19= 37-28= 87-29= 47-29=
93-28= 77-29= 89-34= 57+34= 56+33=
67-23= 45+34= 56+29= 76-29= 87-29=
33-19= 54-34= 78-27= 56-32= 65-34=
76-34= 65-7= 67-34= 56+44= 65-43=
45+12= 45+14= 55-43= 78-45= 45-15=
34-19= 45+29= 100-38= 28+39=38+29=
19+39= 57+28= 45+14= 67+29= 45+39=
38+29=45+29= 39+47= 39+29= 66-23=
45+39= 100-38= 37+38= 29+19= 78-28=
45+29= 78-29= 34+38= 76-39= 68+28=
16+39= 66+27= 39-18= 78-39= 38-22=
87-39= 39+29= 48+33= 55+20= 29+30=
22+56= 49+44= 30+39= 33+20= 78-29=
44+39= 28+20= 54-29= 44-8= 24+47=
28+20= 48+38= 87-39= 56-29= 78-38=
57-46= 67-19= 45-12= 77-30= 55+34=
66+23= 45+22= 56-34= 88-28= 35-9=
56-29= 45-29= 44+21= 45+45= 78-29=
33+22= 35+36= 87-39= 78-30= 44-39=
78-30= 33+33= 45+27= 88-39= 34+33=
55+29= 22+78= 76-39= 37+33= 87-29=
45+30= 78-44= 44+29= 67+22= 65-29=
27+29= 22+47= 45+23= 89-33= 65-24=
89-19= 34+29= 54-39= 33-29= 76-39=
56+48= 47+38= 33+33= 67-43= 67-33=
98-33= 78