(2008+200.8+20.08+2.008+1992+199.2+19.92+1.992)怎么写?
1个回答
原式=2008+(200.8+199.2)+(20.08+19.92)+(2.008+1.992) (利用结合律)
=2008+400+40+4
=2452
相关问题
2008+200.8+20.08+2.008+199.2+19.92+1.992=
2008+200.8+20.08+2.008+992+99.2+9.92+0.992 简算
简便算法0.2008+2.008+20.08+200.8+2008
2.008*390+20.08*41+20.08* 41+200.
简便运算:1.993*1993000+19.92*199200-199.3*19920-1992*1991=?
199.4*19.93-199.3*19.92的简便计算
(1+19/92*1)+(1+19/92*2)+(1+19/92*3)+…+(1+19/92*10)+(1+19/92*
巧算下面的题:例1:199.4X19.93-199.3x19.92 例2: 5.4x3.8-6.5x4.4+2.7x5.
1998+199.8+19.98+1.998+2.222=
20.2,20.2,20.2,20.1,20,20,19.9,19.8,19.8.