9.63-7.52-2.49+0.432000-1998+1996-1994+…-6+4-212×(0.875×12.4+1+4.4×78)×43-14[1-(112+12+110)×212]÷1125.-数学
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答案
(1)9.63-7.52-2.49+0.43, =(9.63+0.43)-(7.52+2.49), =10.06-10.01, =0.05; (2)2000-1998+1996-1994+…-6+4-2, =++…+(8-6)+(4-2), =2×500, =1000; (3)
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