www.zmzy.net > 0.65+9.9×6.5的简便计算方法

0.65+9.9×6.5的简便计算方法

0.65+9.9*6.5=6.5*0.1+9.9*6.5=6.5*(0.1+9.9)=6.5*10=65

56.5*9.9+5.65可以将56.5*9.9转换成5.65*99,5.65转换成5.65*1.56.5*9.9+5.65=5.65*99+5.65*1=5.65*(99+1)=565扩展资料:简便运算常用的公式:加法:a+b=b+a(加法交换律)a+b+c=a+(b+c) (加法结合律)a+99=a+(100-1)(近似

原式=6.5x(10-0.1)+6.5=6.5x10-6.5x0.1+6.5=65+6.5-0.65=70.85 望采纳

=6.5*0.1+6.5*10.9 =6.5*(10.9+0.1) =71.5

0.65+10.9*6.5=6.5*(0.1+10.9)=6.5*11=71.5

0.65 + 10.9/6.5= 0.65 + 1.09/0.65= 2.327

6.5+65x9.9=6.5x(1+10x9.9)=6.5x(1+99)=6.5x100=650 谢谢,请采纳

0.65+10.9x6.5=0.65+109x0.65=(1+109)x0.65=110x0.65=71.5或0.65+10.9x6.5=6.5x0.1+10.9x6.5=(0.1+10.9)x6.5=11x6.5=

6.5*9.9+6.5=6.5*(9.9+1)=6.5*(10+1-0.1)=65+6.5-0.65=70.85

0.65+10.9x6.5=0.65x1+109x0.65=0.65x(1+109)=0.65x110=71.5

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