393176310
幼苗
共回答了24个问题采纳率:83.3% 举报
1.若a²=9,则a=±3 若a³=8,则a= 2 若|a|=5,则a=±5
2.(-1又1/5)²÷3/5×(-5/12)=36/25×5/3×﹙﹣5/12﹚=﹣36/25×25/36=﹣1
3.(-1/2)²+1/2×(2/3-|2/3-2|)=1/4﹢1/2×﹙﹣2/3﹚=1/4﹣1/3=﹣1/12
4.-2的5次方÷(-4)×(1/2)²-12×(-15+2的四次方)³
=2³×1/4﹣12×1³=2﹣12=﹣10
5.2又2/9×(-1又1/2³)-(-1.2)²÷0.4²=﹣20/9×9/8﹣3²=﹣5/2﹣9=﹣11.5
6.-2的四次方-(-2)²-3²÷(-1又1/2)=﹣16﹣4﹣9=﹣29
1年前
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