做一道减法题时,把减数个位上的1看作7,把被减数十位上的7看作1,得出的差是234.那正确的是多少?
做一道减法题时,把减数个位上的1看作7,把被减数十位上的7看作1,得出的差是234.那正确的是多少?
数学人气：436 ℃时间：2019-09-29 00:21:05
优质解答
234+(7-1)-(10-70)=234+6+60=300
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