人教版四年级数学下册加法运算定律练习题精选72Word格式.docx
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187-26-17-57873-373-11-89
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43+35-10+65+57
760+350=350+____
96+____=17+____
809-51-49=809〇(51+____)
(86+29)+31=86+(____+____)
130+(670+10)=(130+____)+____
____+79=79+32
145-86-14=____〇(____〇____)
a+30=30+____
34+24+7670+28+10
485-26-74618-86-218
689+57+14335+196+25
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730-19-24-57673-373-27-73
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170+(830+83)=(170+____)+____
____+66=66+42
296-75-25=____〇(____〇____)
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815-25-32-43579-379-53-47
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962-90-10=____〇(____〇____)
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851-12-88317-27-217
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603-60-40=____〇(____〇____)
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507-45-55=____〇(____〇____)
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866-84-16913-31-813
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974-56-44=____〇(____〇____)
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100-90-10632-75-232
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552-15-29-56528-228-32-68
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