单选题123456788×123456790-123456789×123456789=( )。A-1B0C1D2
单选题
123456788×123456790-123456789×123456789=( )。
A
-1
B
0
C
1
D
2
参考解析
解析:
(123456789-1)×(123456789+1)-1234567892=1234567892-1-1234567892=-1。
(123456789-1)×(123456789+1)-1234567892=1234567892-1-1234567892=-1。
相关考题:
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