10.2×9.8-10.12 查看更多

 

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(-10)·(-0.3×102)·(0.4×105)等于

[  ]

A.1.2×108
B.-0.12×107
C.1.2×107
D.-0.12×108

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(1)10-(-10)=________;

(2)0-(-5)=________;

(3)0.9-(-0.9)=________;

(4)-66-66=________;

(5)8.9-(+8.9)=________;

(6)24-(+12)=________;

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(9-10)×(10-11)×(11-12)×…×(2008-2009)=________.

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(1)10-(-10)=________;

(2)0-(-5)=________;

(3)0.9-(-0.9)=________;

(4)-66-66=________;

(5)8.9-(+8.9)=________;

(6)24-(+12)=________;

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在-2,3,4,-5这四个数中,任取两个数相乘,所得的积最大的是

[  ]

A.20
B.-20
C.12
D.10

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