小学三年级下册(三下)人教版数学第八单元检测卷.1
第八单元检测一、填一填。1.用5、7、9三张数字卡片,能摆成( )个不同的两位数,它们分别是()。如果用0代替9,能摆成( )个不同的两位数。2.用3、4、5、6这四个数字,能组成( )个不同的两位数,分别是()。3.3个小朋友互相通一次电话,一共要通( )次电话;4个小朋友,每两人互相通一次电话,一共要通( )次电话。二、算一算。8×9= 6×7= 5×4=9×7=5×9=5×6=4×9=7×8=6×9=7×9-9=5×7+20=三、在里填上“>”“<”或“=”。4×624 25+8352×61219+83×830+62434-20155×73242+106×9四、...
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