42x201简便计算(
42x201简便计算? -
42×201 =42×200+42 =8400+42 =8442
4.2x201 =4.2x(200+1)=4.2x200+4.2x1 =840+4.2 =844.2
42×201 =42×200+42 =8400+42 =8442
4.2x201 =4.2x(200+1)=4.2x200+4.2x1 =840+4.2 =844.2
如图，
=43x(200+1)=43×200+43×1 =8600+43 =8643
42x201+2的简便计算(四年级) -
42 X （200+1）2 =42 X 200+42X1+2 =8400+42+2 =8444
这个我知道！请看以下运算过程49×201 =（50-1）×（200+1）50×200+50×1-1×200-1 =10000+50-200-1 =10000-200+50-1 =9800+50-1 =9850-1 =9849 完全不需要计算，直接口算，
0.42x201的简便计算 -
0.42×201 =0.42×(200+1)=84+0.42 =84.42
47x201 =47x200+47x1 =9400+47 =9747
54X201用简便方法计算 -
回答：54x201 =54x(200+1) =54x200+54x1 =
0.45x201 =0.45×(200+1)=0.45×200+0.45 =90+0.45 =90.45