Question

3.78✖️10.1-37.8怎么巧算？

Answer 1

巧算如下:
=3.78×10.1－3.78×10
=3.78×(10.1－10)
=0.378

Answer 2

3.78✖️10.1-37.8
=3.78×(10.1-10)
=3.78×0.1
=0.378

Answer 3

3.78×(10+0.1)-3.78×10
＝3.78×10+3.78×0.1-3.78×10
＝0.378

Answer 4

原式=3.78*10.1-3.78*10
=3.78*(10.1-10)
=3.78*0.1
=0.378
我认为这样算简单。