奥数(简便计算)急!999.99×77778+33333×666.66
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奥数(简便计算)急!999.99×77778+33333×666.66
奥数(简便计算)急!
999.99×77778+33333×666.66
奥数(简便计算)急!999.99×77778+33333×666.66
999.99×77778+33333×666.66
=999.99×77778+333.33×66666
=999.99×77778+999.99×22222
=999.99×(77778+22222)
==999.99×100000
=99999000
=999.99*(77778+22222)
=99999000