Question

6.18✖️9.9+61.8怎么简算?小学四年级

Answer 1

6.18✖️9.9+61.8
=6.18x9.9+6.18x10
=6.18ⅹ(9.9+10)
=6.18ⅹ(20-0.1)
=6.18x20-6.18X0.1
=123.6-0.618
=122.982

追问

可以再简单一点吗

追答

6.18✖️9.9+61.8
=61.8x0.99+61.8ⅹ1
=61.8x(0.99+1)
=61.8x2-61.8ⅹ0.01
=123.6-0.618
=122.982

追问

我们小学最多四个等号

我们小学最多四个等号

追答

6.18✖️9.9+61.8
=61.8x0.99+61.8ⅹ1
=61.8x(2-0.01)
=61.8x2-61.8ⅹ0.01
=122.982

Answer 2

。4.5??9??1.2 =4.5*(10-1)*1.2 =4.5*10*1.2-4.5*1*1.2 =45*1.2-4.5*1.2 =4.5*10*1.2-4.5*1.2 =4.5*(10*1.2-1.2) =4.5*(12-1.2) =4.5*10.8 =4.5*(10+0.8) =4.5*10+4.5*0.8 =45+3.6 =48.6

追问

小学四年级的