简便计算题12.5*64*0.2.69*0.4*5怎样简便运算
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![简便计算题12.5*64*0.2.69*0.4*5怎样简便运算](/uploads/image/z/468699-51-9.jpg?t=%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%E9%A2%9812.5%2A64%2A0.2.69%2A0.4%2A5%E6%80%8E%E6%A0%B7%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97)
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简便计算题12.5*64*0.2.69*0.4*5怎样简便运算
简便计算题12.5*64*0.
2.69*0.4*5怎样简便运算
简便计算题12.5*64*0.2.69*0.4*5怎样简便运算
12.5*64*0.025
=12.5*8*2*4*0.025
=(12.5*8)*2*(4*0.025)
=100*2*0.1
=20
12.5*64*0.025
=12.5*8*4*2*0.025
=(12.5*8)*(0.025*4)*2
=100*0.1*2
=20