Question

3.79×99+37.9×0.1的简便方法？

Answer 1

原式
3.79×99+3.79
＝3.79×（99+1）
＝3.79×100
＝379

Answer 2

原式=37.9×9.9+37.9×0.1
=37.9×（9.9+0.1）
=37.9×10
=379

Answer 3

3.79x99+37.9x0.1
=3.79x99+3.79
=3.79x100
=379

Answer 4

=3.79x99+3.79×1
=3.79x(99+1)
=3.76x100
=376