huboy
幼苗
共回答了28个问题采纳率:85.7% 举报
根据题意,得:
(1)(+9)+(-3)+(+4)+(-2)+(-8)+(+13)+(-3)+(+10)+(+7)+(+3)+(-5)
=[(+9)+(+4)+(+13)+(+10)+(+7)+(+3)]+[(-3)+(-2)+(-8)+(-3)+(-5)]
=46+(-21)
=25(千米);
答:收工时距A地25千米.
(2)0.3×(|+9|+|-3|+|+4|+|-2|+|-8|+|+13|+|-3|+|+10|+|+7|+|+3|+|-5|)
=0.3×(9+3+4+2+8+13+3+10+7+3+5)
=0.3×67,
=20.1(升).
答:收工时共耗油20.1升.
1年前
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