0.125*0.25*0.5*128 3.51*49+351*0.51+49*51 999999*444444/666666 简便计算

A: 1/8X1/4X1/2X2^7=2^(-3)X2^(-2)X2^(-1)X2^7=2^(-3-2-1+7)=2^(1)=2;
B:351X0.51=3.51X100X51X1/100=3.51X51X100X1/100=3.51X51;
3.51X49+351X0.51=3.51X49+3.51X51=3.51X(49+51)=3.51X100=351;
49X51=(50-1)X(50+1)=50^2-1=2500-1;
that is 351+2500-1=2500+350=2850;
C:999999*444444/666666=111111X9X111111X4/(111111X6)=111111X(4X9)/6=36/6X111111=666666;
注：^ 表示 幂 ；例如a^b， 表示a的b次方；
楼上的（久久_九九2）几年级水平啊？，不会就别误人子弟啊；为了点分数不值得啊！

1/8*1/4*1/2*2的七次方=1/2的六次方乘以2的七次方=2
（3.51+1）*（49+51）=451

0.125*0.25*0.5*128=0.125*8*0.25*4*0.5*2*2=1*1*1*2=23.51*49+351*0.51+49*51 =3.51*(49+51)+49*51=351+49*51=300+51*(1+49)=300+2550=2850999999*444444/666666 =333333*3*2*2*111111/(2*3*111111)=333333*2=66666...