657+99用简便方法做
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发布时间:2024-10-01 09:53
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时间:2024-11-14 03:47
234-34-66
=234-(34+66)
=234-100
=134
528-53-47
=528-(53+47)
=528-100
=428
435-(135+189)
=435-135-189
=300-189
=111
248-75-25
=248-(75+25)
=248-100
=148
627-98
=627-(100-2)
=627-100+2
=527+2
=529
498+86
=598+2+84
=600+84
=684
278-102
=278-(100+2)
=278-100-2
=178-2
=176
657+99
=657+(100-1)
=657+100-1
=756
127+44+73
=(127+73)+44
=244
故答案为:134,428,111,148,529,584,176,756,244.