【观察与归纳】
(1)观察下列各式的大小关系:
|-2|+|3|>|-2+3| ;|-8|+|3|>|-8+3|
|-2|+|-3|=|-2-3|;|0|+|-6|=|0-6|
归纳:|a|+|b| |a+b|(用“>”或“<”或“=”或“≥”或“≤”填空)
【理解与应用】
(2)根据上题中得出的结论,若|m|+|n|=9,|m+n|=1,求m的值.
(1)观察下列各式的大小关系:
|-2|+|3|>|-2+3| ;|-8|+|3|>|-8+3|
|-2|+|-3|=|-2-3|;|0|+|-6|=|0-6|
归纳:|a|+|b| |a+b|(用“>”或“<”或“=”或“≥”或“≤”填空)
【理解与应用】
(2)根据上题中得出的结论,若|m|+|n|=9,|m+n|=1,求m的值.
19-20七年级上·江苏徐州·期中 查看更多[3]
江苏省徐州市睢宁县2019-2020学年七年级上学期期中数学试题(已下线)练习4 绝对值与相反数-2020-2021学年【补习教材·寒假作业】七年级数学(苏科版)河南省信阳市罗山县尤店乡中学2023-2024学年七年级上学期10月月考数学试题
更新时间:2019-11-14 11:13:56
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