Question

看谁算得快．
=
=
=
=
=
=
=
=

Answer 1

解：
=，
=，
=，
=0，
=1，
=，
=1，
=．
分析：根据分数加减法的计算方法进行计算；
根据连减的性质进行计算；
、和根据加法交换律进行计算．
点评：口算时，注意运算符号和数据，然后再进一步计算．