84×[10.8÷(48.6+5.4)-0.2][(514-4.25)×58]÷38+3.3÷1562014×(3.4×69+3.5)3.5×69-3.41-3+5-7+9-11+13-…-39+41729×38+629×712+329×79121+2022121+50505212121+131313-数学
题文
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答案
(1)84×[10.8÷(48.6+5.4)-0.2], =84×[10.8÷54-0.2], =84×[0.2-0.2], =0; (2)[(5
=[(5.25-4.25)×
=
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