文档介绍:-
. z.
1) 88-69= 2) 91-29= 3) 38-25= 4) 71-53=
5) 72-48= 6) 323= 48+50= 66-36= 87-25= 48+41= 43+43= 40+58= 96-68= 25+44= 37+60= 62-36=
52+41= 32+59= 61-41= 81-36= 90-67= 92-42= 83-36= 20+69= 90-51= 74-27=
34+55= 44+47= 75+21= 34+55= 26+48= 70+24= 41+26= 23+45= 86-25= 76-35=
89-55= 85-25= 31+55= 35+29= 96-75= 79-40= 95-65= 31+44= 53+34= 53-20= 61-39= 60-20= 26+67= 71+23= 42+27= 39+43= 59-25= 98-36= 93-61= 31+22=
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. z.
74-49= 83-36= 66-25= 64-28= 39+57= 80-28= 83-35= 87-37= 93-35= 96-22= 45-24= 98-49= 69-31= 75-33= 79-34= 29+62= 36+51= 89-30= 37+43= 83-55=
55+24= 20+39= 53+37= 67-22= 100-65= 35+63= 89-35= 24+53= 67-47= 89-38=
1〕48+27= 2〕81-27= 3〕47-28= 4〕57+38=
5〕28+77= 6〕66-27= 7〕87-58= 8〕90-53=
9〕84-26= 10〕71-28= 11〕62-48= 12〕78+44=
13〕25+27=