Question

2.6×0.35+0.26×3.9+0.026×16怎么简便算？

Answer 1

因为0.26×3.9=2.6×0.39，0.026×16=2.6×0.16，所以原式等于2.6×0.35+2.6×0.16+2.6×0.39，运用乘法分配律逆运算就是有2.6×（0.35+0.16+0.39）=2.34

Answer 2

2.6×0.35+0.26×3.9+0.026×16
=2.6×0.35+2.6×0.39+2.6×0.16
=2.6×(0.35+0.39+0.16)
=2.6×0.9
=2.6×(1-0.1)
=2.6-0.26
=2.34