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532−472612−392=()A.311B.511C.711D.911

题目详情
532−472
612−392
=(  )

A.
3
11

B.
5
11

C.
7
11

D.
9
11
532−472
612−392
=(  )

A.
3
11

B.
5
11

C.
7
11

D.
9
11
532−472
612−392
532−472532−472532−472532−4722−4724724722612−392612−392612−392612−3922−3923923922

3
11

B.
5
11

C.
7
11

D.
9
11
3
11
331111
5
11

C.
7
11

D.
9
11
5
11
551111
7
11

D.
9
11
7
11
771111
9
11
9
11
991111
▼优质解答
答案和解析
532−472
612−392

=
(53+47)(53−47)
(61+39)(61−39)

=
100×6
100×22

=
3
11

故选A.
532−472
612−392
532−472532−472532−4722−4722612−392612−392612−3922−3922,
=
(53+47)(53−47)
(61+39)(61−39)

=
100×6
100×22

=
3
11

故选A.
(53+47)(53−47)
(61+39)(61−39)
(53+47)(53−47)(53+47)(53−47)(53+47)(53−47)(61+39)(61−39)(61+39)(61−39)(61+39)(61−39),
=
100×6
100×22

=
3
11

故选A.
100×6
100×22
100×6100×6100×6100×22100×22100×22,
=
3
11

故选A.
3
11
333111111.
故选A.