68乘52递等式计算用4种方法68乘52=3536 - 知识问答

68乘52递等式计算用4种方法68乘52=3536哦

1个回答

68*52
=68*(50+2)
=68*50+68*2
=3400+136
=3536
68*52
=(60+8)*52
=60*52+8*52
=3120+416
=3536
68*52
=(60+8)*(60-8)
=60*60-8*8
=3600-64
=3536
68*52
=(70-2)*52
=3640-104
=3528

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