简算﹙999²＋999﹚×0.
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简算﹙999²＋999﹚×0.简算﹙999²＋999﹚×0.简算﹙999²＋999﹚×0.﹙999²＋999﹚×0.01=999×（999+1）×0.01=99
简算﹙999²＋999﹚×0.
简算﹙999²＋999﹚×0.
简算﹙999²＋999﹚×0.
﹙999²＋999﹚×0.01
=999×（999+1）×0.01
=999×1000×0.01
=999×10
=9990
（9992+999）×0.01
=（999×999+999）×0.01
=999×（999+1）×0.01
=999×1000×0.01
=9990