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97×97/98怎么简便计算

97*97/98 =(98-1)*(98-1)/98 =(98*98 - 2*98 + 1)/98 =98 - 2 +1/98 =96 + 1/98

=(98-1)*97/98 =98*97/98-1*97/98 =97-97/98 =96+1-97/98 =96+1/98 =96又98分之1

97x97/98 =(98-1)x97/98 =97-1/98 =96又97/98

97除以97又98分之97 =97÷(98x97+97)/98 =97x98÷(97x99) =98/99

97×97/98=97/98×(98-1)=97/98×98-97/98×1=97-97/98=96又(1/98)

99乘以97加98用简便计算怎么做 99*97+98 =99*97+97+1 =97*(99+1)+1 =97*100+1 =9700+1 =9701

98x97/99 =(99-1)97/99 =97-97/99 =96又99分之2

17.18

45/97x98 =45/97x(97+1) =45/97x97+45/97 =45+45/97 =45又97分之45

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