题目内容
[2007-(8.5×8.5-1.5×1.5)÷10]÷160-0.3.
[2007-(8.5×8.5-1.5×1.5)÷10]÷160-0.3,
=[2007-(8.52-1.52)÷10]÷160-0.3,
=[2007-(8.5+1.5)×(8.5-1.5)÷10]÷160-0.3,
=[2007-10×7÷10]÷160-0.3,
=[2007-70÷10]÷160-0.3,
=[2007-7]÷160-0.3,
=2000÷160-0.3,
=12.5-0.3,
=12.2.
=[2007-(8.52-1.52)÷10]÷160-0.3,
=[2007-(8.5+1.5)×(8.5-1.5)÷10]÷160-0.3,
=[2007-10×7÷10]÷160-0.3,
=[2007-70÷10]÷160-0.3,
=[2007-7]÷160-0.3,
=2000÷160-0.3,
=12.5-0.3,
=12.2.
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