256乘68的简便运算?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 06:23:37
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256乘68的简便运算?
256乘68的简便运算?
256乘68的简便运算?
256*68
=(250+6)*(70-2)
=250*70-250*2+6*70-6*2
=17500-500+420-12
=17000+420-12
=17420-12
=17408
256=4^4,68=4*17,256*68=4^4*4*17=4^5*17=4^5*(16+1)=4^5*(4^2+1)=4^7+4^5=17408
256=4×4×4×4,68=4×4×4
即256=四的四次方,68=四的三次方+4
256×68= 四的七次方+256×4=17408