Question

78.5*0.81+7.85*1.9如何简算

Answer 1

78.5*(0.81+1.9)
=78.5*2.71
=212.735(约等于212.7)

Answer 2

其他人的答案都是错的，应该是
78.5×0.81+78.5×0.19
=（0.81+0.19）×78.9
=1×78.9
=78.9

Answer 3

7.85*（0.81+1.9）=。。。。0.81或者1.9小数点没错么？