Question

0.46×1.9+4.6×0.19简便计算？

Answer 1

0.46×1.9+4.6×0.19
＝0.46×1.9+0.46×1.9
=0.46×1.9×2
=0.46×3.8
=0.46×4-0.46×0.2
=1.84-0.092
=1.838

Answer 2

0.46x1.9+4.6x0.19
=0.46ⅹ1.9+0.46x1.9
=0.46x(1.9+1.9)
=0.46ⅹ2x1.9
=0.92ⅹ(2一0.1)
=1.84一0.092
=1.748。