解:
方法1:
35X64
=35X(8X8)
=280X8
=2240
方法2:
35X64
=(5X7)X64
=5X64X7(乘法交换律)
=320X7
=2240
方法3:
35X64
=(30+5)X64
=30Ⅹ64+5X64(乘法分配律)
=1920+320
=2240
64乘以35乘64 简便计算
64×35×64=143360
143360
解:
方法1:
35X64
=35X(8X8)
=280X8
=2240
方法2:
35X64
=(5X7)X64
=5X64X7(乘法交换律)
=320X7
=2240
方法3:
35X64
=(30+5)X64
=30Ⅹ64+5X64(乘法分配律)
=1920+320
=2240
64乘以35乘64 简便计算
64×35×64=143360
143360