人教版四年级数学下册加法运算定律练习题精选101Word格式文档下载.docx
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914-28-31-41539-439-64-36
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35-34+33-32+…+19-18+17-16
22+42-25+58+78
970+480=480+____
98+____=45+____
321-65-35=321〇(65+____)
(11+12)+58=11+(____+____)
160+(540+52)=(160+____)+____
____+75=75+40
464-88-12=____〇(____〇____)
c+67=67+____
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661-16-15-69912-312-58-42
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56+____=46+____
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430+(470+47)=(430+____)+____
____+63=63+33
100-71-29=____〇(____〇____)
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397-53-47=____〇(____〇____)
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523-36-64=____〇(____〇____)
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