139x137/138+137x1/138的简便运算 答案上是275又68/69
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139x137/138+137x1/138的简便运算 答案上是275又68/69
139x137/138+137x1/138的简便运算 答案上是275又68/69
139x137/138+137x1/138的简便运算 答案上是275又68/69
139x137/138+137x1/138
=139x137/138+137/138
=(139+1)x137/138
=(138+2)x137/138
=138x137/138+2x137/138
=137+137/69
=137+1+68/69
=138又68/69
139x137/138+137x1/138
=(138+1)(138-1)/138+137/138
=(138 ^2 -1)/138+137/138
=138-/138+137/138
=138又68/69
要么题抄错了,要么答案错了。题目弄错了等下139x137/138+137x1又1/138 在帮我算下139x137/138+137x139/138 ...
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139x137/138+137x1/138
=(138+1)(138-1)/138+137/138
=(138 ^2 -1)/138+137/138
=138-/138+137/138
=138又68/69
要么题抄错了,要么答案错了。
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139x137/138—137x1/138
139X137/138-137X1 1/138
简算;139X137/138-137X1/138急
139x137/138+137x1/138的简便运算 答案上是275又68/69
139x137/138+137x1/138奥数减算:1993x1994-1/1993+1992x1994
计算:139x137/138+137x139/138
139x137/138+137x1又1/138的简便运算 答案上是275又68/69
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