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三年级数学下册一《除法》集邮课堂作业北师大版.doc

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1集 邮备选练习口 0648，要使商是两位数，口内可以填 ( )A 14 B13 C59分析：三位数除以两位数，要使商是两位数，则被除数的前两位数字必须大于或等于除数。解答：口 0648，要使商是两位数，则：口 048，则口4，可以填5、6、7、8、9。答案 C典型例题宋老师带了 126 元钱去给航模小组的同学买飞机。(1)橡皮筋飞机每架 7 元，可以买多少架？(2)如果全部买成每架 3 元的手掷飞机，可以买多少架？答案(1)1267=18(架)(2)1263=42(架)

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