87×102 1998-99(简便计算)有的话写出来87×102(1道)1998-99(2道)
网友回答
87×102
=87*(100+2)
=87*100+87*2
=8700+174
=88741998-99
=1998-100+1
=1898+1
=1899======以下答案可供参考======
供参考答案1:
87×102
=87×(100+2)
=8700+174
=88741998-99
=1998-(100-1)
=1998-100+1
=1899供参考答案2:
87×102
=87x(100+2)
=87x100+87x2
=8700+174
=88741998-99
=1998-100+1
=1898+1
=1899供参考答案3:
87×102
=87×(100+2)
=8700+174
=88741998-99
=1998-(100-1)
=1998-100+1
=1999-100
=1899