1.89x6.3 18.9x0.47-0.189x10怎么算简便?

2025-04-06 11:13:56
推荐回答(1个)
回答1:

1. 8 9×6. 3+18.9×0.47-0.189×10
=1. 8 9×6. 3+1. 8 9×4.7-1. 8 9
=1. 8 9×(6. 3+4.7-1)
=1. 8 9×10
=1 8.9