简便计算：986×89－987×88

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简便计算：986×89－987×88简便计算：986×89－987×88简便计算：986×89－987×88986×89－987×88=986×89－(986+1)×88=986×89－986×88-

简便计算：986×89－987×88
简便计算：986×89－987×88

简便计算：986×89－987×88
986×89－987×88=986×89－(986+1)×88=986×89－986×88-88=986-88=898

986×89－987×88=986×89-(986+1)×(88-1)=986×89-986×89+1=1

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简便计算：986×89－987×88 如何简便计算:986×89－987×88 如何简便计算:986×89－987×88 986乘89减987乘88（用简便计算）如何简便计算986*89-987+88,四年级题请支持一下,谢谢 (-99 88/89)*367 简便计算 89*87/88的简便计算简便计算 88×92 简便计算125+88 88x99简便计算 88x125 简便计算 986+(356+244)简便计算 89×99+89简便计算 256-89简便方法计算 89×99+1简便计算 102×88的简便计算 125*88的简便计算 88*125（简便计算）