11456×55+457×45的值是:
A45645 B45655 C45665 D45675
127900÷25÷8的值是:
A39 B39.5 C41.5 D42.5
13123456×654321的值为:
A80779853376 B80779853375 C80779853378 D80779853377
14 423×187-423×24-423×63的值是:
A41877 B42300 C42323 D42703
15.大于4/5且小于5/6的数是:( ) (2000年题)
A.6/7 B.21/30 C.49/60 D.47/61
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