999+99简便计算

濮风解31171999加999乘999用简便方法计算 -
杭杰周18082359166 ______ 解答过程如下: 1999+999*999 =1000+999+999*999 =1000+999*(1+999) =1000+999*1000 =1000*(1+999) =1000*1000 =1000000 扩展资料 常用简便计算方法: 1、加法交换律:a+b=b+a 2、乘法交换律:a*b=b*a 3、加法结合律:(a...

濮风解3117999乘99加99怎样简便计算 -
杭杰周18082359166 ______[答案] =(999+1)*99 =1000*99 =99000

濮风解31179+99+999+9999+99999=?怎样计算比较简便?请你写出主要过程. -
杭杰周18082359166 ______[答案] 9+99+999+9999+99999 =(10-1)+(100-1)+(1000-1)+(10000-1)+(100000-1) =10+100+1000+10000+100000-5 =111110-5 =111105

濮风解3117简算:9999+999+99+9=______. -
杭杰周18082359166 ______[答案] 9999+999+99+9 =(9999+1)+(999+1)+(99+1)+(9+1)-4 =(10000+1000+100+10)-4 =11110-4 =11106 故答案为:11106.

濮风解3117999乘以999+1999用简便方法计算
杭杰周18082359166 ______ 999*999+1999 =(1000-1)*999+1999 =1000*999 -999 +1000 +999 =(1000*999 +1000) +(999-999 ) =1000*(999 +1) +0 =1000*1000 =1000000 999*999+1999 =(1000-1)*999+1999 =999000-999+1999 =999000+(1999-999) =999000+1000 =1000000

濮风解3117999的平方+1999要求简算1993乘1994 - 1————————简算1993+1332乘1994 -
杭杰周18082359166 ______[答案] 999*999+1999=999*999+1000+999=999*(999+1)+1000=999*1000+1000=1000*(999+1)=1000*1000=1000000

濮风解31171999+999*99,简便计算, -
杭杰周18082359166 ______[答案] 1999+999*99 =1000+999+999*99 =1000+999*(1+99) =1000+999*100 =1000+99900 =100900

濮风解311799+999+9999 怎样简算 -
杭杰周18082359166 ______[答案] (100-1)+(1000-1)+(10000-1)=11100-3=11097

濮风解311799.9乘以999加1999的简便计算 -
杭杰周18082359166 ______[答案] 如果是999 * 999 +1999就有简便计算 = 999^2 + 2*999 + 1 =(999 +1)^2 = 1,000,000

濮风解31171999+999的平方 用简便算法算 -
杭杰周18082359166 ______[答案] 1000+999+999^2 =1000+999*(999+1) =1000+999*1000 =1000*(999+1) =1000000