>
61+4×610+59×61用簡便方法計算為:
61+4×610+59×61
=1×61+59×61+4×610
=(1+59)×61+4×610
=60×61+4×610
=60×61+4×10×61
=60×61+40×61
=(60+40)×61
=100×61
=6100
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