Question

1.3×1.6+2.6×1.5+3.9×1.8怎么用简便方法计算？

Answer 1

1.3×1.6+2.6×1.5+3.9×1.8
=1.3x1.6+1.3x2x1.5+1.3x3x1.8
=1.3x（1.6+3+5.4）
=1.3x10
=13
希望能帮到你！