人教版四年级数学下册加法运算定律练习题精选87Word文档格式.docx
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937-32-24-44948-448-18-82
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24-23+22-21+…+8-7+6-5
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940+160=160+____
94+____=42+____
287-36-64=287〇(36+____)
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370+(230+34)=(370+____)+____
____+72=72+49
694-54-46=____〇(____〇____)
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939-33-67672-49-572
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537-72-28=____〇(____〇____)
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