九点八一乘零点一加零点五乘九十八点一加零点零四九乘九百八十一 简便计算

问题描述:

九点八一乘零点一加零点五乘九十八点一加零点零四九乘九百八十一 简便计算

9.81*0.1 0.5*98.1 0.049*981
=9.81*0.1 9.81*5 9.81*4.9
=9.81*(0.1 5 4.9)
=9.81*10
=98.1

(99+1)+0.5=100x0.5=50

9.81*0.1+0.5*98.1+0.049*981
=98.1*0.01+98.1*0.5+98.1*0.49
=98.1*(0.01+0.5+0.49)
=98.1*1
=98.1